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Finding the Fourth Proportional to 166.41, 249.56 and 68.91

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Solution

The fourth proportional to 166.41, 249.56 and 68.91 is: 103.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.41 : 249.56 = 68.91 : x
  2. Step 2: Convert to fraction form
    166.41/249.56 = 68.91/x
  3. Step 3: Cross multiply
    166.41x = 249.56 × 68.91
  4. Step 4: Simplify right side
    166.41x = 17,197.18
  5. Step 5: Solve for x
    x = 17,197.18/166.41
  6. Step 6: Final answer
    x = 103.34

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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.