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Finding the Fourth Proportional to 87,668.61, 131,595.92 and 71,227.16

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Solution

The fourth proportional to 87,668.61, 131,595.92 and 71,227.16 is: 106,916.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,668.61 : 131,595.92 = 71,227.16 : x
  2. Step 2: Convert to fraction form
    87,668.61/131,595.92 = 71,227.16/x
  3. Step 3: Cross multiply
    87,668.61x = 131,595.92 × 71,227.16
  4. Step 4: Simplify right side
    87,668.61x = 9,373,202,635.07
  5. Step 5: Solve for x
    x = 9,373,202,635.07/87,668.61
  6. Step 6: Final answer
    x = 106,916.29

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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.