Home / 83,921.20-126,027.60-81,296.80

Finding the Fourth Proportional to 83,921.20, 126,027.60 and 81,296.80

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Solution

The fourth proportional to 83,921.20, 126,027.60 and 81,296.80 is: 122,086.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,921.20 : 126,027.60 = 81,296.80 : x
  2. Step 2: Convert to fraction form
    83,921.20/126,027.60 = 81,296.80/x
  3. Step 3: Cross multiply
    83,921.20x = 126,027.60 × 81,296.80
  4. Step 4: Simplify right side
    83,921.20x = 10,245,640,591.68
  5. Step 5: Solve for x
    x = 10,245,640,591.68/83,921.20
  6. Step 6: Final answer
    x = 122,086.44

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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.