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Finding the Fourth Proportional to 69.46, 104.18 and 63.81

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Solution

The fourth proportional to 69.46, 104.18 and 63.81 is: 95.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.46 : 104.18 = 63.81 : x
  2. Step 2: Convert to fraction form
    69.46/104.18 = 63.81/x
  3. Step 3: Cross multiply
    69.46x = 104.18 × 63.81
  4. Step 4: Simplify right side
    69.46x = 6,647.41
  5. Step 5: Solve for x
    x = 6,647.41/69.46
  6. Step 6: Final answer
    x = 95.70

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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.