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Finding the Fourth Proportional to 127,972.80, 192,016.80 and 61,387.20

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Solution

The fourth proportional to 127,972.80, 192,016.80 and 61,387.20 is: 92,108.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,972.80 : 192,016.80 = 61,387.20 : x
  2. Step 2: Convert to fraction form
    127,972.80/192,016.80 = 61,387.20/x
  3. Step 3: Cross multiply
    127,972.80x = 192,016.80 × 61,387.20
  4. Step 4: Simplify right side
    127,972.80x = 11,787,373,704.96
  5. Step 5: Solve for x
    x = 11,787,373,704.96/127,972.80
  6. Step 6: Final answer
    x = 92,108.43

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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.