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Finding the Fourth Proportional to 138,482.55, 207,640.80 and 63,508.79

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Solution

The fourth proportional to 138,482.55, 207,640.80 and 63,508.79 is: 95,225.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,482.55 : 207,640.80 = 63,508.79 : x
  2. Step 2: Convert to fraction form
    138,482.55/207,640.80 = 63,508.79/x
  3. Step 3: Cross multiply
    138,482.55x = 207,640.80 × 63,508.79
  4. Step 4: Simplify right side
    138,482.55x = 13,187,016,481.73
  5. Step 5: Solve for x
    x = 13,187,016,481.73/138,482.55
  6. Step 6: Final answer
    x = 95,225.11

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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.