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Finding the Fourth Proportional to 63.78, 95.64 and 32.91

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Solution

The fourth proportional to 63.78, 95.64 and 32.91 is: 49.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.78 : 95.64 = 32.91 : x
  2. Step 2: Convert to fraction form
    63.78/95.64 = 32.91/x
  3. Step 3: Cross multiply
    63.78x = 95.64 × 32.91
  4. Step 4: Simplify right side
    63.78x = 3,147.51
  5. Step 5: Solve for x
    x = 3,147.51/63.78
  6. Step 6: Final answer
    x = 49.35

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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.