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Finding the Fourth Proportional to 126.60, 173.21 and 125.39

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Solution

The fourth proportional to 126.60, 173.21 and 125.39 is: 171.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.60 : 173.21 = 125.39 : x
  2. Step 2: Convert to fraction form
    126.60/173.21 = 125.39/x
  3. Step 3: Cross multiply
    126.60x = 173.21 × 125.39
  4. Step 4: Simplify right side
    126.60x = 21,717.31
  5. Step 5: Solve for x
    x = 21,717.31/126.60
  6. Step 6: Final answer
    x = 171.54

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.