Home / 129,500.92-178,711.14-72,911.08

Finding the Fourth Proportional to 129,500.92, 178,711.14 and 72,911.08

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Solution

The fourth proportional to 129,500.92, 178,711.14 and 72,911.08 is: 100,617.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,500.92 : 178,711.14 = 72,911.08 : x
  2. Step 2: Convert to fraction form
    129,500.92/178,711.14 = 72,911.08/x
  3. Step 3: Cross multiply
    129,500.92x = 178,711.14 × 72,911.08
  4. Step 4: Simplify right side
    129,500.92x = 13,030,022,225.43
  5. Step 5: Solve for x
    x = 13,030,022,225.43/129,500.92
  6. Step 6: Final answer
    x = 100,617.22

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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.