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Finding the Fourth Proportional to 260,672.91, 391,016.21 and 83,179.73

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Solution

The fourth proportional to 260,672.91, 391,016.21 and 83,179.73 is: 124,771.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,672.91 : 391,016.21 = 83,179.73 : x
  2. Step 2: Convert to fraction form
    260,672.91/391,016.21 = 83,179.73/x
  3. Step 3: Cross multiply
    260,672.91x = 391,016.21 × 83,179.73
  4. Step 4: Simplify right side
    260,672.91x = 32,524,622,773.42
  5. Step 5: Solve for x
    x = 32,524,622,773.42/260,672.91
  6. Step 6: Final answer
    x = 124,771.78

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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.