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Finding the Fourth Proportional to 171.60, 255.68 and 161.12

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Solution

The fourth proportional to 171.60, 255.68 and 161.12 is: 240.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.60 : 255.68 = 161.12 : x
  2. Step 2: Convert to fraction form
    171.60/255.68 = 161.12/x
  3. Step 3: Cross multiply
    171.60x = 255.68 × 161.12
  4. Step 4: Simplify right side
    171.60x = 41,193.08
  5. Step 5: Solve for x
    x = 41,193.08/171.60
  6. Step 6: Final answer
    x = 240.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.