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Finding the Fourth Proportional to 166.75, 249.81 and 156.43

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Solution

The fourth proportional to 166.75, 249.81 and 156.43 is: 234.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.75 : 249.81 = 156.43 : x
  2. Step 2: Convert to fraction form
    166.75/249.81 = 156.43/x
  3. Step 3: Cross multiply
    166.75x = 249.81 × 156.43
  4. Step 4: Simplify right side
    166.75x = 39,077.78
  5. Step 5: Solve for x
    x = 39,077.78/166.75
  6. Step 6: Final answer
    x = 234.35

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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.