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Finding the Fourth Proportional to 96.63, 133.31 and 63.89

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Solution

The fourth proportional to 96.63, 133.31 and 63.89 is: 88.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.63 : 133.31 = 63.89 : x
  2. Step 2: Convert to fraction form
    96.63/133.31 = 63.89/x
  3. Step 3: Cross multiply
    96.63x = 133.31 × 63.89
  4. Step 4: Simplify right side
    96.63x = 8,517.17
  5. Step 5: Solve for x
    x = 8,517.17/96.63
  6. Step 6: Final answer
    x = 88.15

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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.