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Finding the Fourth Proportional to 96.62, 133.18 and 80.88

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Solution

The fourth proportional to 96.62, 133.18 and 80.88 is: 111.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.62 : 133.18 = 80.88 : x
  2. Step 2: Convert to fraction form
    96.62/133.18 = 80.88/x
  3. Step 3: Cross multiply
    96.62x = 133.18 × 80.88
  4. Step 4: Simplify right side
    96.62x = 10,771.60
  5. Step 5: Solve for x
    x = 10,771.60/96.62
  6. Step 6: Final answer
    x = 111.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.