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Finding the Fourth Proportional to 63.78, 95.73 and 59.85

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Solution

The fourth proportional to 63.78, 95.73 and 59.85 is: 89.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.78 : 95.73 = 59.85 : x
  2. Step 2: Convert to fraction form
    63.78/95.73 = 59.85/x
  3. Step 3: Cross multiply
    63.78x = 95.73 × 59.85
  4. Step 4: Simplify right side
    63.78x = 5,729.44
  5. Step 5: Solve for x
    x = 5,729.44/63.78
  6. Step 6: Final answer
    x = 89.83

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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.