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Finding the Fourth Proportional to 129,040.55, 193,531.80 and 54,245.15

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Solution

The fourth proportional to 129,040.55, 193,531.80 and 54,245.15 is: 81,355.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,040.55 : 193,531.80 = 54,245.15 : x
  2. Step 2: Convert to fraction form
    129,040.55/193,531.80 = 54,245.15/x
  3. Step 3: Cross multiply
    129,040.55x = 193,531.80 × 54,245.15
  4. Step 4: Simplify right side
    129,040.55x = 10,498,161,520.77
  5. Step 5: Solve for x
    x = 10,498,161,520.77/129,040.55
  6. Step 6: Final answer
    x = 81,355.52

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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.