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Finding the Fourth Proportional to 170.76, 255.57 and 129.96

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Solution

The fourth proportional to 170.76, 255.57 and 129.96 is: 194.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.76 : 255.57 = 129.96 : x
  2. Step 2: Convert to fraction form
    170.76/255.57 = 129.96/x
  3. Step 3: Cross multiply
    170.76x = 255.57 × 129.96
  4. Step 4: Simplify right side
    170.76x = 33,213.88
  5. Step 5: Solve for x
    x = 33,213.88/170.76
  6. Step 6: Final answer
    x = 194.51

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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.