If the Marginal Propensity to Consume (MPC) is 4 times the value of the Marginal Propensity to Save (MPS), we can represent this relationship with the equation:

  MPC = 4 * MPS

Now, let's solve for MPC:

MPC = 4 * MPS

If we assume MPS to be "x," then:

MPC = 4 * x

Since we want to find the value of MPC, we need to find the value of "x" (MPS) first. To do this, we can set the equation for the sum of MPC and MPS to equal 1, as they are complements (MPC + MPS = 1).

           MPC + MPS = 1

Now, we know that MPC = 4 * MPS, so we can substitute this in:

4 * MPS + MPS = 1

Now, combine like terms:

5 * MPS = 1

Now, solve for MPS:

MPS = 1 / 5

So, the value of MPS is 1/5. Now, we can find the value of MPC:

MPC = 4 * MPS
MPC = 4 * (1/5)
MPC = 4/5

Therefore, the value of MPC is 4/5, which is equivalent to 0.80.

So, the correct answer is:

(4) 0.80