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Finding the Fourth Proportional to 87,712, 131,553.44 and 31,540.76

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Solution

The fourth proportional to 87,712, 131,553.44 and 31,540.76 is: 47,305.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,712 : 131,553.44 = 31,540.76 : x
  2. Step 2: Convert to fraction form
    87,712/131,553.44 = 31,540.76/x
  3. Step 3: Cross multiply
    87,712x = 131,553.44 × 31,540.76
  4. Step 4: Simplify right side
    87,712x = 4,149,295,478.21
  5. Step 5: Solve for x
    x = 4,149,295,478.21/87,712
  6. Step 6: Final answer
    x = 47,305.90

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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.