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Finding the Fourth Proportional to 87,691.74, 131,557.08 and 40,919.10

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Solution

The fourth proportional to 87,691.74, 131,557.08 and 40,919.10 is: 61,387.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,691.74 : 131,557.08 = 40,919.10 : x
  2. Step 2: Convert to fraction form
    87,691.74/131,557.08 = 40,919.10/x
  3. Step 3: Cross multiply
    87,691.74x = 131,557.08 × 40,919.10
  4. Step 4: Simplify right side
    87,691.74x = 5,383,197,312.23
  5. Step 5: Solve for x
    x = 5,383,197,312.23/87,691.74
  6. Step 6: Final answer
    x = 61,387.74

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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.