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Finding the Fourth Proportional to 126.29, 174.26 and 76.49

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Solution

The fourth proportional to 126.29, 174.26 and 76.49 is: 105.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.29 : 174.26 = 76.49 : x
  2. Step 2: Convert to fraction form
    126.29/174.26 = 76.49/x
  3. Step 3: Cross multiply
    126.29x = 174.26 × 76.49
  4. Step 4: Simplify right side
    126.29x = 13,328.18
  5. Step 5: Solve for x
    x = 13,328.18/126.29
  6. Step 6: Final answer
    x = 105.53

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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.