Home / 129,465.28-178,677.66-72,887.32

Finding the Fourth Proportional to 129,465.28, 178,677.66 and 72,887.32

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Solution

The fourth proportional to 129,465.28, 178,677.66 and 72,887.32 is: 100,593.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,465.28 : 178,677.66 = 72,887.32 : x
  2. Step 2: Convert to fraction form
    129,465.28/178,677.66 = 72,887.32/x
  3. Step 3: Cross multiply
    129,465.28x = 178,677.66 × 72,887.32
  4. Step 4: Simplify right side
    129,465.28x = 13,023,335,781.27
  5. Step 5: Solve for x
    x = 13,023,335,781.27/129,465.28
  6. Step 6: Final answer
    x = 100,593.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.