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Finding the Fourth Proportional to 80.96, 121.17 and 60.62

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Solution

The fourth proportional to 80.96, 121.17 and 60.62 is: 90.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.96 : 121.17 = 60.62 : x
  2. Step 2: Convert to fraction form
    80.96/121.17 = 60.62/x
  3. Step 3: Cross multiply
    80.96x = 121.17 × 60.62
  4. Step 4: Simplify right side
    80.96x = 7,345.33
  5. Step 5: Solve for x
    x = 7,345.33/80.96
  6. Step 6: Final answer
    x = 90.73

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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.