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Finding the Fourth Proportional to 80.15, 120.20 and 41.62

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Solution

The fourth proportional to 80.15, 120.20 and 41.62 is: 62.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.15 : 120.20 = 41.62 : x
  2. Step 2: Convert to fraction form
    80.15/120.20 = 41.62/x
  3. Step 3: Cross multiply
    80.15x = 120.20 × 41.62
  4. Step 4: Simplify right side
    80.15x = 5,002.72
  5. Step 5: Solve for x
    x = 5,002.72/80.15
  6. Step 6: Final answer
    x = 62.42

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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.