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Finding the Fourth Proportional to 87,516.80, 131,294.40 and 28,342.40

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Solution

The fourth proportional to 87,516.80, 131,294.40 and 28,342.40 is: 42,519.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,516.80 : 131,294.40 = 28,342.40 : x
  2. Step 2: Convert to fraction form
    87,516.80/131,294.40 = 28,342.40/x
  3. Step 3: Cross multiply
    87,516.80x = 131,294.40 × 28,342.40
  4. Step 4: Simplify right side
    87,516.80x = 3,721,198,402.56
  5. Step 5: Solve for x
    x = 3,721,198,402.56/87,516.80
  6. Step 6: Final answer
    x = 42,519.82

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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.