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Finding the Fourth Proportional to 138,416.70, 207,625.05 and 88,553.10

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Solution

The fourth proportional to 138,416.70, 207,625.05 and 88,553.10 is: 132,829.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,416.70 : 207,625.05 = 88,553.10 : x
  2. Step 2: Convert to fraction form
    138,416.70/207,625.05 = 88,553.10/x
  3. Step 3: Cross multiply
    138,416.70x = 207,625.05 × 88,553.10
  4. Step 4: Simplify right side
    138,416.70x = 18,385,841,815.16
  5. Step 5: Solve for x
    x = 18,385,841,815.16/138,416.70
  6. Step 6: Final answer
    x = 132,829.65

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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.