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Finding the Fourth Proportional to 129,560.97, 193,902.54 and 79,672.68

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Solution

The fourth proportional to 129,560.97, 193,902.54 and 79,672.68 is: 119,239.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,560.97 : 193,902.54 = 79,672.68 : x
  2. Step 2: Convert to fraction form
    129,560.97/193,902.54 = 79,672.68/x
  3. Step 3: Cross multiply
    129,560.97x = 193,902.54 × 79,672.68
  4. Step 4: Simplify right side
    129,560.97x = 15,448,735,020.61
  5. Step 5: Solve for x
    x = 15,448,735,020.61/129,560.97
  6. Step 6: Final answer
    x = 119,239.11

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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.