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Finding the Fourth Proportional to 169.63, 255.49 and 129.33

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Solution

The fourth proportional to 169.63, 255.49 and 129.33 is: 194.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.63 : 255.49 = 129.33 : x
  2. Step 2: Convert to fraction form
    169.63/255.49 = 129.33/x
  3. Step 3: Cross multiply
    169.63x = 255.49 × 129.33
  4. Step 4: Simplify right side
    169.63x = 33,042.20
  5. Step 5: Solve for x
    x = 33,042.20/169.63
  6. Step 6: Final answer
    x = 194.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.