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Finding the Fourth Proportional to 126.75, 174.85 and 117.96

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Solution

The fourth proportional to 126.75, 174.85 and 117.96 is: 162.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.75 : 174.85 = 117.96 : x
  2. Step 2: Convert to fraction form
    126.75/174.85 = 117.96/x
  3. Step 3: Cross multiply
    126.75x = 174.85 × 117.96
  4. Step 4: Simplify right side
    126.75x = 20,625.31
  5. Step 5: Solve for x
    x = 20,625.31/126.75
  6. Step 6: Final answer
    x = 162.72

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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.