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Finding the Fourth Proportional to 80,572.78, 120,817.66 and 36,161.46

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Solution

The fourth proportional to 80,572.78, 120,817.66 and 36,161.46 is: 54,223.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,572.78 : 120,817.66 = 36,161.46 : x
  2. Step 2: Convert to fraction form
    80,572.78/120,817.66 = 36,161.46/x
  3. Step 3: Cross multiply
    80,572.78x = 120,817.66 × 36,161.46
  4. Step 4: Simplify right side
    80,572.78x = 4,368,942,979.38
  5. Step 5: Solve for x
    x = 4,368,942,979.38/80,572.78
  6. Step 6: Final answer
    x = 54,223.56

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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.