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Finding the Fourth Proportional to 69.71, 103.88 and 63.73

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Solution

The fourth proportional to 69.71, 103.88 and 63.73 is: 94.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.71 : 103.88 = 63.73 : x
  2. Step 2: Convert to fraction form
    69.71/103.88 = 63.73/x
  3. Step 3: Cross multiply
    69.71x = 103.88 × 63.73
  4. Step 4: Simplify right side
    69.71x = 6,620.49
  5. Step 5: Solve for x
    x = 6,620.49/69.71
  6. Step 6: Final answer
    x = 94.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.