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Finding the Fourth Proportional to 138,766.60, 208,247.10 and 88,967.80

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Solution

The fourth proportional to 138,766.60, 208,247.10 and 88,967.80 is: 133,514.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,766.60 : 208,247.10 = 88,967.80 : x
  2. Step 2: Convert to fraction form
    138,766.60/208,247.10 = 88,967.80/x
  3. Step 3: Cross multiply
    138,766.60x = 208,247.10 × 88,967.80
  4. Step 4: Simplify right side
    138,766.60x = 18,527,286,343.38
  5. Step 5: Solve for x
    x = 18,527,286,343.38/138,766.60
  6. Step 6: Final answer
    x = 133,514.02

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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.