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Finding the Fourth Proportional to 126.27, 174.36 and 86.92

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Solution

The fourth proportional to 126.27, 174.36 and 86.92 is: 120.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.27 : 174.36 = 86.92 : x
  2. Step 2: Convert to fraction form
    126.27/174.36 = 86.92/x
  3. Step 3: Cross multiply
    126.27x = 174.36 × 86.92
  4. Step 4: Simplify right side
    126.27x = 15,155.26
  5. Step 5: Solve for x
    x = 15,155.26/126.27
  6. Step 6: Final answer
    x = 120.02

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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.