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Finding the Fourth Proportional to 170.91, 234.05 and 161.55

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Solution

The fourth proportional to 170.91, 234.05 and 161.55 is: 221.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.91 : 234.05 = 161.55 : x
  2. Step 2: Convert to fraction form
    170.91/234.05 = 161.55/x
  3. Step 3: Cross multiply
    170.91x = 234.05 × 161.55
  4. Step 4: Simplify right side
    170.91x = 37,809.97
  5. Step 5: Solve for x
    x = 37,809.97/170.91
  6. Step 6: Final answer
    x = 221.22

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.