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Finding the Fourth Proportional to 87,794.38, 131,691.72 and 21,234.25

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Solution

The fourth proportional to 87,794.38, 131,691.72 and 21,234.25 is: 31,851.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,794.38 : 131,691.72 = 21,234.25 : x
  2. Step 2: Convert to fraction form
    87,794.38/131,691.72 = 21,234.25/x
  3. Step 3: Cross multiply
    87,794.38x = 131,691.72 × 21,234.25
  4. Step 4: Simplify right side
    87,794.38x = 2,796,375,149.65
  5. Step 5: Solve for x
    x = 2,796,375,149.65/87,794.38
  6. Step 6: Final answer
    x = 31,851.41

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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.