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Finding the Fourth Proportional to 166.42, 229.68 and 122.18

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Solution

The fourth proportional to 166.42, 229.68 and 122.18 is: 168.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.42 : 229.68 = 122.18 : x
  2. Step 2: Convert to fraction form
    166.42/229.68 = 122.18/x
  3. Step 3: Cross multiply
    166.42x = 229.68 × 122.18
  4. Step 4: Simplify right side
    166.42x = 28,062.30
  5. Step 5: Solve for x
    x = 28,062.30/166.42
  6. Step 6: Final answer
    x = 168.62

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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.