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Finding the Fourth Proportional to 129,860.97, 179,207.42 and 72,496.97

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Solution

The fourth proportional to 129,860.97, 179,207.42 and 72,496.97 is: 100,045.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,860.97 : 179,207.42 = 72,496.97 : x
  2. Step 2: Convert to fraction form
    129,860.97/179,207.42 = 72,496.97/x
  3. Step 3: Cross multiply
    129,860.97x = 179,207.42 × 72,496.97
  4. Step 4: Simplify right side
    129,860.97x = 12,991,994,951.52
  5. Step 5: Solve for x
    x = 12,991,994,951.52/129,860.97
  6. Step 6: Final answer
    x = 100,045.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.