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Finding the Fourth Proportional to 127,900.70, 192,023.85 and 81,244.70

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Solution

The fourth proportional to 127,900.70, 192,023.85 and 81,244.70 is: 121,976.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,900.70 : 192,023.85 = 81,244.70 : x
  2. Step 2: Convert to fraction form
    127,900.70/192,023.85 = 81,244.70/x
  3. Step 3: Cross multiply
    127,900.70x = 192,023.85 × 81,244.70
  4. Step 4: Simplify right side
    127,900.70x = 15,600,920,086.10
  5. Step 5: Solve for x
    x = 15,600,920,086.10/127,900.70
  6. Step 6: Final answer
    x = 121,976.82

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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.