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Finding the Fourth Proportional to 166.40, 229.78 and 133.86

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Solution

The fourth proportional to 166.40, 229.78 and 133.86 is: 184.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.40 : 229.78 = 133.86 : x
  2. Step 2: Convert to fraction form
    166.40/229.78 = 133.86/x
  3. Step 3: Cross multiply
    166.40x = 229.78 × 133.86
  4. Step 4: Simplify right side
    166.40x = 30,758.35
  5. Step 5: Solve for x
    x = 30,758.35/166.40
  6. Step 6: Final answer
    x = 184.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.