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Finding the Fourth Proportional to 126.74, 175.72 and 122.29

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Solution

The fourth proportional to 126.74, 175.72 and 122.29 is: 169.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.74 : 175.72 = 122.29 : x
  2. Step 2: Convert to fraction form
    126.74/175.72 = 122.29/x
  3. Step 3: Cross multiply
    126.74x = 175.72 × 122.29
  4. Step 4: Simplify right side
    126.74x = 21,487.31
  5. Step 5: Solve for x
    x = 21,487.31/126.74
  6. Step 6: Final answer
    x = 169.54

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.