Home / 87,691.86-131,491.62-28,520.15

Finding the Fourth Proportional to 87,691.86, 131,491.62 and 28,520.15

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Solution

The fourth proportional to 87,691.86, 131,491.62 and 28,520.15 is: 42,765.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,691.86 : 131,491.62 = 28,520.15 : x
  2. Step 2: Convert to fraction form
    87,691.86/131,491.62 = 28,520.15/x
  3. Step 3: Cross multiply
    87,691.86x = 131,491.62 × 28,520.15
  4. Step 4: Simplify right side
    87,691.86x = 3,750,160,068.68
  5. Step 5: Solve for x
    x = 3,750,160,068.68/87,691.86
  6. Step 6: Final answer
    x = 42,765.20

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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.