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Finding the Fourth Proportional to 126.44, 174.49 and 117.80

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Solution

The fourth proportional to 126.44, 174.49 and 117.80 is: 162.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.44 : 174.49 = 117.80 : x
  2. Step 2: Convert to fraction form
    126.44/174.49 = 117.80/x
  3. Step 3: Cross multiply
    126.44x = 174.49 × 117.80
  4. Step 4: Simplify right side
    126.44x = 20,553.76
  5. Step 5: Solve for x
    x = 20,553.76/126.44
  6. Step 6: Final answer
    x = 162.56

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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.