Home / 126,086.20-188,870.10-86,687.80

Finding the Fourth Proportional to 126,086.20, 188,870.10 and 86,687.80

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Solution

The fourth proportional to 126,086.20, 188,870.10 and 86,687.80 is: 129,853.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,086.20 : 188,870.10 = 86,687.80 : x
  2. Step 2: Convert to fraction form
    126,086.20/188,870.10 = 86,687.80/x
  3. Step 3: Cross multiply
    126,086.20x = 188,870.10 × 86,687.80
  4. Step 4: Simplify right side
    126,086.20x = 16,372,733,454.78
  5. Step 5: Solve for x
    x = 16,372,733,454.78/126,086.20
  6. Step 6: Final answer
    x = 129,853.49

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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.