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Finding the Fourth Proportional to 87,773.38, 131,658.74 and 21,213.04

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Solution

The fourth proportional to 87,773.38, 131,658.74 and 21,213.04 is: 31,819.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,773.38 : 131,658.74 = 21,213.04 : x
  2. Step 2: Convert to fraction form
    87,773.38/131,658.74 = 21,213.04/x
  3. Step 3: Cross multiply
    87,773.38x = 131,658.74 × 21,213.04
  4. Step 4: Simplify right side
    87,773.38x = 2,792,882,117.97
  5. Step 5: Solve for x
    x = 2,792,882,117.97/87,773.38
  6. Step 6: Final answer
    x = 31,819.24

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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.