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Finding the Fourth Proportional to 126.35, 173.37 and 122.91

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Solution

The fourth proportional to 126.35, 173.37 and 122.91 is: 168.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.35 : 173.37 = 122.91 : x
  2. Step 2: Convert to fraction form
    126.35/173.37 = 122.91/x
  3. Step 3: Cross multiply
    126.35x = 173.37 × 122.91
  4. Step 4: Simplify right side
    126.35x = 21,308.91
  5. Step 5: Solve for x
    x = 21,308.91/126.35
  6. Step 6: Final answer
    x = 168.65

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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.