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Finding the Fourth Proportional to 80.75, 121.12 and 22.97

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Solution

The fourth proportional to 80.75, 121.12 and 22.97 is: 34.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.75 : 121.12 = 22.97 : x
  2. Step 2: Convert to fraction form
    80.75/121.12 = 22.97/x
  3. Step 3: Cross multiply
    80.75x = 121.12 × 22.97
  4. Step 4: Simplify right side
    80.75x = 2,782.50
  5. Step 5: Solve for x
    x = 2,782.50/80.75
  6. Step 6: Final answer
    x = 34.46

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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.