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Finding the Fourth Proportional to 170.32, 255.96 and 84.88

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Solution

The fourth proportional to 170.32, 255.96 and 84.88 is: 127.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.32 : 255.96 = 84.88 : x
  2. Step 2: Convert to fraction form
    170.32/255.96 = 84.88/x
  3. Step 3: Cross multiply
    170.32x = 255.96 × 84.88
  4. Step 4: Simplify right side
    170.32x = 21,725.88
  5. Step 5: Solve for x
    x = 21,725.88/170.32
  6. Step 6: Final answer
    x = 127.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.