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Finding the Fourth Proportional to 129.69, 194.54 and 126.27

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Solution

The fourth proportional to 129.69, 194.54 and 126.27 is: 189.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.69 : 194.54 = 126.27 : x
  2. Step 2: Convert to fraction form
    129.69/194.54 = 126.27/x
  3. Step 3: Cross multiply
    129.69x = 194.54 × 126.27
  4. Step 4: Simplify right side
    129.69x = 24,563.93
  5. Step 5: Solve for x
    x = 24,563.93/129.69
  6. Step 6: Final answer
    x = 189.41

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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.