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Finding the Fourth Proportional to 63.72, 96.12 and 57.92

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Solution

The fourth proportional to 63.72, 96.12 and 57.92 is: 87.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.72 : 96.12 = 57.92 : x
  2. Step 2: Convert to fraction form
    63.72/96.12 = 57.92/x
  3. Step 3: Cross multiply
    63.72x = 96.12 × 57.92
  4. Step 4: Simplify right side
    63.72x = 5,566.79
  5. Step 5: Solve for x
    x = 5,566.79/63.72
  6. Step 6: Final answer
    x = 87.36

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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.