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Finding the Fourth Proportional to 80,620.39, 120,945.13 and 33,209.61

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Solution

The fourth proportional to 80,620.39, 120,945.13 and 33,209.61 is: 49,820.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,620.39 : 120,945.13 = 33,209.61 : x
  2. Step 2: Convert to fraction form
    80,620.39/120,945.13 = 33,209.61/x
  3. Step 3: Cross multiply
    80,620.39x = 120,945.13 × 33,209.61
  4. Step 4: Simplify right side
    80,620.39x = 4,016,540,598.70
  5. Step 5: Solve for x
    x = 4,016,540,598.70/80,620.39
  6. Step 6: Final answer
    x = 49,820.41

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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.