We introduce and study nonlinear production-consumption equilibrium (NPCE). The NPCE is a combination and generalization of both classical linear programming (LP) and classical input-output (IO) models. In contrast to LP and IO the NPCE has both production and consumption components. Moreover, the production cost, the consumption and the factors (resources) availability are not fixed. Instead, they are correspondent functions of the production output, prices of goods and prices of factors. At the NPCE the total production cost reaches its minimum, while the total consumption, without factors expenses, reaches its maximum. At the same time the production cost is consistent with the production output, the

consumption is consistent with the prices for goods, and the factors availability is consistent with prices for factors. Finding NPCE is equivalent to solving a variational inequality (VI) with a particular nonlinear operator and a simple feasible set. Under natural assumptions on the production, consumption and factor operators the NPCE exists, and it is unique. Projecting on the feasible set is a low-cost operation. Therefore, for solving the VI we use two projection methods. Each of them requires, at each step, few matrix by vector multiplications and allows, along with convergence and convergence rate, establishing complexity bounds. The methods decompose the problem, so both the primal and the dual variables are computed simultaneously. On the other hand, both methods are pricing mechanisms for establishing NPCE, which is a generalization of the Walras-Wald equilibrium in a few directions.