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Finding the Fourth Proportional to 126.44, 189.52 and 75.13

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Solution

The fourth proportional to 126.44, 189.52 and 75.13 is: 112.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.44 : 189.52 = 75.13 : x
  2. Step 2: Convert to fraction form
    126.44/189.52 = 75.13/x
  3. Step 3: Cross multiply
    126.44x = 189.52 × 75.13
  4. Step 4: Simplify right side
    126.44x = 14,238.64
  5. Step 5: Solve for x
    x = 14,238.64/126.44
  6. Step 6: Final answer
    x = 112.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.