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Finding the Fourth Proportional to 126.44, 174.37 and 90.91

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Solution

The fourth proportional to 126.44, 174.37 and 90.91 is: 125.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.44 : 174.37 = 90.91 : x
  2. Step 2: Convert to fraction form
    126.44/174.37 = 90.91/x
  3. Step 3: Cross multiply
    126.44x = 174.37 × 90.91
  4. Step 4: Simplify right side
    126.44x = 15,850.65
  5. Step 5: Solve for x
    x = 15,850.65/126.44
  6. Step 6: Final answer
    x = 125.37

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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.