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Finding the Fourth Proportional to 185.68, 255.68 and 161.12

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Solution

The fourth proportional to 185.68, 255.68 and 161.12 is: 221.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.68 : 255.68 = 161.12 : x
  2. Step 2: Convert to fraction form
    185.68/255.68 = 161.12/x
  3. Step 3: Cross multiply
    185.68x = 255.68 × 161.12
  4. Step 4: Simplify right side
    185.68x = 41,195.16
  5. Step 5: Solve for x
    x = 41,195.16/185.68
  6. Step 6: Final answer
    x = 221.86

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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.