Home / 126,139.20-188,949.60-86,740.80

Finding the Fourth Proportional to 126,139.20, 188,949.60 and 86,740.80

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Solution

The fourth proportional to 126,139.20, 188,949.60 and 86,740.80 is: 129,932.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,139.20 : 188,949.60 = 86,740.80 : x
  2. Step 2: Convert to fraction form
    126,139.20/188,949.60 = 86,740.80/x
  3. Step 3: Cross multiply
    126,139.20x = 188,949.60 × 86,740.80
  4. Step 4: Simplify right side
    126,139.20x = 16,389,639,463.68
  5. Step 5: Solve for x
    x = 16,389,639,463.68/126,139.20
  6. Step 6: Final answer
    x = 129,932.96

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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.