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Finding the Fourth Proportional to 126.14, 174.03 and 79.55

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Solution

The fourth proportional to 126.14, 174.03 and 79.55 is: 109.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.14 : 174.03 = 79.55 : x
  2. Step 2: Convert to fraction form
    126.14/174.03 = 79.55/x
  3. Step 3: Cross multiply
    126.14x = 174.03 × 79.55
  4. Step 4: Simplify right side
    126.14x = 13,844.09
  5. Step 5: Solve for x
    x = 13,844.09/126.14
  6. Step 6: Final answer
    x = 109.75

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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.