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Finding the Fourth Proportional to 408,092.70, 612,139.05 and 127,695.90

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Solution

The fourth proportional to 408,092.70, 612,139.05 and 127,695.90 is: 191,543.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,092.70 : 612,139.05 = 127,695.90 : x
  2. Step 2: Convert to fraction form
    408,092.70/612,139.05 = 127,695.90/x
  3. Step 3: Cross multiply
    408,092.70x = 612,139.05 × 127,695.90
  4. Step 4: Simplify right side
    408,092.70x = 78,167,646,914.90
  5. Step 5: Solve for x
    x = 78,167,646,914.90/408,092.70
  6. Step 6: Final answer
    x = 191,543.85

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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.