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Finding the Fourth Proportional to 63.82, 96.13 and 61.78

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Solution

The fourth proportional to 63.82, 96.13 and 61.78 is: 93.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.82 : 96.13 = 61.78 : x
  2. Step 2: Convert to fraction form
    63.82/96.13 = 61.78/x
  3. Step 3: Cross multiply
    63.82x = 96.13 × 61.78
  4. Step 4: Simplify right side
    63.82x = 5,938.91
  5. Step 5: Solve for x
    x = 5,938.91/63.82
  6. Step 6: Final answer
    x = 93.06

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.