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Finding the Fourth Proportional to 87,693.60, 131,540.40 and 73,696.80

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Solution

The fourth proportional to 87,693.60, 131,540.40 and 73,696.80 is: 110,545.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,693.60 : 131,540.40 = 73,696.80 : x
  2. Step 2: Convert to fraction form
    87,693.60/131,540.40 = 73,696.80/x
  3. Step 3: Cross multiply
    87,693.60x = 131,540.40 × 73,696.80
  4. Step 4: Simplify right side
    87,693.60x = 9,694,106,550.72
  5. Step 5: Solve for x
    x = 9,694,106,550.72/87,693.60
  6. Step 6: Final answer
    x = 110,545.20

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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.