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Finding the Fourth Proportional to 87,755.26, 131,549.84 and 54,042

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Solution

The fourth proportional to 87,755.26, 131,549.84 and 54,042 is: 81,011.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,755.26 : 131,549.84 = 54,042 : x
  2. Step 2: Convert to fraction form
    87,755.26/131,549.84 = 54,042/x
  3. Step 3: Cross multiply
    87,755.26x = 131,549.84 × 54,042
  4. Step 4: Simplify right side
    87,755.26x = 7,109,216,453.28
  5. Step 5: Solve for x
    x = 7,109,216,453.28/87,755.26
  6. Step 6: Final answer
    x = 81,011.86

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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.