Home / 80,126.92-120,139.50-42,663.88

Finding the Fourth Proportional to 80,126.92, 120,139.50 and 42,663.88

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Solution

The fourth proportional to 80,126.92, 120,139.50 and 42,663.88 is: 63,968.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,126.92 : 120,139.50 = 42,663.88 : x
  2. Step 2: Convert to fraction form
    80,126.92/120,139.50 = 42,663.88/x
  3. Step 3: Cross multiply
    80,126.92x = 120,139.50 × 42,663.88
  4. Step 4: Simplify right side
    80,126.92x = 5,125,617,211.26
  5. Step 5: Solve for x
    x = 5,125,617,211.26/80,126.92
  6. Step 6: Final answer
    x = 63,968.73

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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.