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Finding the Fourth Proportional to 185.26, 255.22 and 129.90

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Solution

The fourth proportional to 185.26, 255.22 and 129.90 is: 178.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.26 : 255.22 = 129.90 : x
  2. Step 2: Convert to fraction form
    185.26/255.22 = 129.90/x
  3. Step 3: Cross multiply
    185.26x = 255.22 × 129.90
  4. Step 4: Simplify right side
    185.26x = 33,153.08
  5. Step 5: Solve for x
    x = 33,153.08/185.26
  6. Step 6: Final answer
    x = 178.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.