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Finding the Fourth Proportional to 80,363.66, 120,555.21 and 38,781.50

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Solution

The fourth proportional to 80,363.66, 120,555.21 and 38,781.50 is: 58,176.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,363.66 : 120,555.21 = 38,781.50 : x
  2. Step 2: Convert to fraction form
    80,363.66/120,555.21 = 38,781.50/x
  3. Step 3: Cross multiply
    80,363.66x = 120,555.21 × 38,781.50
  4. Step 4: Simplify right side
    80,363.66x = 4,675,311,876.62
  5. Step 5: Solve for x
    x = 4,675,311,876.62/80,363.66
  6. Step 6: Final answer
    x = 58,176.94

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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.