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Finding the Fourth Proportional to 126.52, 172.26 and 126.11

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Solution

The fourth proportional to 126.52, 172.26 and 126.11 is: 171.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.52 : 172.26 = 126.11 : x
  2. Step 2: Convert to fraction form
    126.52/172.26 = 126.11/x
  3. Step 3: Cross multiply
    126.52x = 172.26 × 126.11
  4. Step 4: Simplify right side
    126.52x = 21,724.14
  5. Step 5: Solve for x
    x = 21,724.14/126.52
  6. Step 6: Final answer
    x = 171.71

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.