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Finding the Fourth Proportional to 63.72, 96.11 and 61.56

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Solution

The fourth proportional to 63.72, 96.11 and 61.56 is: 92.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.72 : 96.11 = 61.56 : x
  2. Step 2: Convert to fraction form
    63.72/96.11 = 61.56/x
  3. Step 3: Cross multiply
    63.72x = 96.11 × 61.56
  4. Step 4: Simplify right side
    63.72x = 5,916.53
  5. Step 5: Solve for x
    x = 5,916.53/63.72
  6. Step 6: Final answer
    x = 92.85

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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.