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Finding the Fourth Proportional to 166.34, 249.48 and 85.12

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Solution

The fourth proportional to 166.34, 249.48 and 85.12 is: 127.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.34 : 249.48 = 85.12 : x
  2. Step 2: Convert to fraction form
    166.34/249.48 = 85.12/x
  3. Step 3: Cross multiply
    166.34x = 249.48 × 85.12
  4. Step 4: Simplify right side
    166.34x = 21,235.11
  5. Step 5: Solve for x
    x = 21,235.11/166.34
  6. Step 6: Final answer
    x = 127.66

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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.