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Finding the Fourth Proportional to 166.49, 249.65 and 68.97

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Solution

The fourth proportional to 166.49, 249.65 and 68.97 is: 103.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.49 : 249.65 = 68.97 : x
  2. Step 2: Convert to fraction form
    166.49/249.65 = 68.97/x
  3. Step 3: Cross multiply
    166.49x = 249.65 × 68.97
  4. Step 4: Simplify right side
    166.49x = 17,218.10
  5. Step 5: Solve for x
    x = 17,218.10/166.49
  6. Step 6: Final answer
    x = 103.42

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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.