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Finding the Fourth Proportional to 126.52, 175.80 and 125

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Solution

The fourth proportional to 126.52, 175.80 and 125 is: 173.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.52 : 175.80 = 125 : x
  2. Step 2: Convert to fraction form
    126.52/175.80 = 125/x
  3. Step 3: Cross multiply
    126.52x = 175.80 × 125
  4. Step 4: Simplify right side
    126.52x = 21,975
  5. Step 5: Solve for x
    x = 21,975/126.52
  6. Step 6: Final answer
    x = 173.69

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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.