Home / 81,313.27-121,899.81-31,428.37

Finding the Fourth Proportional to 81,313.27, 121,899.81 and 31,428.37

Calculator

Solution

The fourth proportional to 81,313.27, 121,899.81 and 31,428.37 is: 47,115.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,313.27 : 121,899.81 = 31,428.37 : x
  2. Step 2: Convert to fraction form
    81,313.27/121,899.81 = 31,428.37/x
  3. Step 3: Cross multiply
    81,313.27x = 121,899.81 × 31,428.37
  4. Step 4: Simplify right side
    81,313.27x = 3,831,112,331.61
  5. Step 5: Solve for x
    x = 3,831,112,331.61/81,313.27
  6. Step 6: Final answer
    x = 47,115.46

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.