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Finding the Fourth Proportional to 87,615.60, 131,455.80 and 84,375.60

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Solution

The fourth proportional to 87,615.60, 131,455.80 and 84,375.60 is: 126,594.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,615.60 : 131,455.80 = 84,375.60 : x
  2. Step 2: Convert to fraction form
    87,615.60/131,455.80 = 84,375.60/x
  3. Step 3: Cross multiply
    87,615.60x = 131,455.80 × 84,375.60
  4. Step 4: Simplify right side
    87,615.60x = 11,091,661,998.48
  5. Step 5: Solve for x
    x = 11,091,661,998.48/87,615.60
  6. Step 6: Final answer
    x = 126,594.60

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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.