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Finding the Fourth Proportional to 137,728.80, 206,593.20 and 95,519.70

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Solution

The fourth proportional to 137,728.80, 206,593.20 and 95,519.70 is: 143,279.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,728.80 : 206,593.20 = 95,519.70 : x
  2. Step 2: Convert to fraction form
    137,728.80/206,593.20 = 95,519.70/x
  3. Step 3: Cross multiply
    137,728.80x = 206,593.20 × 95,519.70
  4. Step 4: Simplify right side
    137,728.80x = 19,733,720,486.04
  5. Step 5: Solve for x
    x = 19,733,720,486.04/137,728.80
  6. Step 6: Final answer
    x = 143,279.55

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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.