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Finding the Fourth Proportional to 129,019.20, 193,269.60 and 89,620.80

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Solution

The fourth proportional to 129,019.20, 193,269.60 and 89,620.80 is: 134,251.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,019.20 : 193,269.60 = 89,620.80 : x
  2. Step 2: Convert to fraction form
    129,019.20/193,269.60 = 89,620.80/x
  3. Step 3: Cross multiply
    129,019.20x = 193,269.60 × 89,620.80
  4. Step 4: Simplify right side
    129,019.20x = 17,320,976,167.68
  5. Step 5: Solve for x
    x = 17,320,976,167.68/129,019.20
  6. Step 6: Final answer
    x = 134,251.15

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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.