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Finding the Fourth Proportional to 80,790.80, 121,360.80 and 68,335.52

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Solution

The fourth proportional to 80,790.80, 121,360.80 and 68,335.52 is: 102,650.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,790.80 : 121,360.80 = 68,335.52 : x
  2. Step 2: Convert to fraction form
    80,790.80/121,360.80 = 68,335.52/x
  3. Step 3: Cross multiply
    80,790.80x = 121,360.80 × 68,335.52
  4. Step 4: Simplify right side
    80,790.80x = 8,293,253,375.62
  5. Step 5: Solve for x
    x = 8,293,253,375.62/80,790.80
  6. Step 6: Final answer
    x = 102,650.96

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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.