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Finding the Fourth Proportional to 63.89, 95.63 and 38.12

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Solution

The fourth proportional to 63.89, 95.63 and 38.12 is: 57.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.89 : 95.63 = 38.12 : x
  2. Step 2: Convert to fraction form
    63.89/95.63 = 38.12/x
  3. Step 3: Cross multiply
    63.89x = 95.63 × 38.12
  4. Step 4: Simplify right side
    63.89x = 3,645.50
  5. Step 5: Solve for x
    x = 3,645.50/63.89
  6. Step 6: Final answer
    x = 57.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.