Home / 136,872.20-205,346.70-66,753.80

Finding the Fourth Proportional to 136,872.20, 205,346.70 and 66,753.80

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Solution

The fourth proportional to 136,872.20, 205,346.70 and 66,753.80 is: 100,149.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,872.20 : 205,346.70 = 66,753.80 : x
  2. Step 2: Convert to fraction form
    136,872.20/205,346.70 = 66,753.80/x
  3. Step 3: Cross multiply
    136,872.20x = 205,346.70 × 66,753.80
  4. Step 4: Simplify right side
    136,872.20x = 13,707,672,542.46
  5. Step 5: Solve for x
    x = 13,707,672,542.46/136,872.20
  6. Step 6: Final answer
    x = 100,149.43

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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.