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Finding the Fourth Proportional to 138,399.10, 207,695.85 and 88,600.30

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Solution

The fourth proportional to 138,399.10, 207,695.85 and 88,600.30 is: 132,962.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,399.10 : 207,695.85 = 88,600.30 : x
  2. Step 2: Convert to fraction form
    138,399.10/207,695.85 = 88,600.30/x
  3. Step 3: Cross multiply
    138,399.10x = 207,695.85 × 88,600.30
  4. Step 4: Simplify right side
    138,399.10x = 18,401,914,618.76
  5. Step 5: Solve for x
    x = 18,401,914,618.76/138,399.10
  6. Step 6: Final answer
    x = 132,962.68

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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.