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Finding the Fourth Proportional to 138,116.80, 207,175.20 and 132,211.90

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Solution

The fourth proportional to 138,116.80, 207,175.20 and 132,211.90 is: 198,317.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,116.80 : 207,175.20 = 132,211.90 : x
  2. Step 2: Convert to fraction form
    138,116.80/207,175.20 = 132,211.90/x
  3. Step 3: Cross multiply
    138,116.80x = 207,175.20 × 132,211.90
  4. Step 4: Simplify right side
    138,116.80x = 27,391,026,824.88
  5. Step 5: Solve for x
    x = 27,391,026,824.88/138,116.80
  6. Step 6: Final answer
    x = 198,317.85

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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.