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Finding the Fourth Proportional to 80,328.87, 120,377.88 and 45,194.31

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Solution

The fourth proportional to 80,328.87, 120,377.88 and 45,194.31 is: 67,726.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,328.87 : 120,377.88 = 45,194.31 : x
  2. Step 2: Convert to fraction form
    80,328.87/120,377.88 = 45,194.31/x
  3. Step 3: Cross multiply
    80,328.87x = 120,377.88 × 45,194.31
  4. Step 4: Simplify right side
    80,328.87x = 5,440,394,999.89
  5. Step 5: Solve for x
    x = 5,440,394,999.89/80,328.87
  6. Step 6: Final answer
    x = 67,726.52

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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.