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Finding the Fourth Proportional to 166.86, 229.71 and 143.85

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Solution

The fourth proportional to 166.86, 229.71 and 143.85 is: 198.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.86 : 229.71 = 143.85 : x
  2. Step 2: Convert to fraction form
    166.86/229.71 = 143.85/x
  3. Step 3: Cross multiply
    166.86x = 229.71 × 143.85
  4. Step 4: Simplify right side
    166.86x = 33,044.13
  5. Step 5: Solve for x
    x = 33,044.13/166.86
  6. Step 6: Final answer
    x = 198.04

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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.