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Finding the Fourth Proportional to 80,672.66, 120,815.19 and 45,046.43

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Solution

The fourth proportional to 80,672.66, 120,815.19 and 45,046.43 is: 67,461.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,672.66 : 120,815.19 = 45,046.43 : x
  2. Step 2: Convert to fraction form
    80,672.66/120,815.19 = 45,046.43/x
  3. Step 3: Cross multiply
    80,672.66x = 120,815.19 × 45,046.43
  4. Step 4: Simplify right side
    80,672.66x = 5,442,292,395.20
  5. Step 5: Solve for x
    x = 5,442,292,395.20/80,672.66
  6. Step 6: Final answer
    x = 67,461.43

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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.