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Finding the Fourth Proportional to 96.62, 133.32 and 74.80

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Solution

The fourth proportional to 96.62, 133.32 and 74.80 is: 103.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.62 : 133.32 = 74.80 : x
  2. Step 2: Convert to fraction form
    96.62/133.32 = 74.80/x
  3. Step 3: Cross multiply
    96.62x = 133.32 × 74.80
  4. Step 4: Simplify right side
    96.62x = 9,972.34
  5. Step 5: Solve for x
    x = 9,972.34/96.62
  6. Step 6: Final answer
    x = 103.21

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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.