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Finding the Fourth Proportional to 125,691.14, 173,491.17 and 72,011.90

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Solution

The fourth proportional to 125,691.14, 173,491.17 and 72,011.90 is: 99,397.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,691.14 : 173,491.17 = 72,011.90 : x
  2. Step 2: Convert to fraction form
    125,691.14/173,491.17 = 72,011.90/x
  3. Step 3: Cross multiply
    125,691.14x = 173,491.17 × 72,011.90
  4. Step 4: Simplify right side
    125,691.14x = 12,493,428,784.92
  5. Step 5: Solve for x
    x = 12,493,428,784.92/125,691.14
  6. Step 6: Final answer
    x = 99,397.85

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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.