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Finding the Fourth Proportional to 87,051.60, 120,085.56 and 65,793.96

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Solution

The fourth proportional to 87,051.60, 120,085.56 and 65,793.96 is: 90,761.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,051.60 : 120,085.56 = 65,793.96 : x
  2. Step 2: Convert to fraction form
    87,051.60/120,085.56 = 65,793.96/x
  3. Step 3: Cross multiply
    87,051.60x = 120,085.56 × 65,793.96
  4. Step 4: Simplify right side
    87,051.60x = 7,900,904,531.22
  5. Step 5: Solve for x
    x = 7,900,904,531.22/87,051.60
  6. Step 6: Final answer
    x = 90,761.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.