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Finding the Fourth Proportional to 69.14, 94.85 and 67.61

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Solution

The fourth proportional to 69.14, 94.85 and 67.61 is: 92.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.14 : 94.85 = 67.61 : x
  2. Step 2: Convert to fraction form
    69.14/94.85 = 67.61/x
  3. Step 3: Cross multiply
    69.14x = 94.85 × 67.61
  4. Step 4: Simplify right side
    69.14x = 6,412.00
  5. Step 5: Solve for x
    x = 6,412.00/69.14
  6. Step 6: Final answer
    x = 92.75

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.