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Finding the Fourth Proportional to 129.75, 195.03 and 112.84

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Solution

The fourth proportional to 129.75, 195.03 and 112.84 is: 169.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.75 : 195.03 = 112.84 : x
  2. Step 2: Convert to fraction form
    129.75/195.03 = 112.84/x
  3. Step 3: Cross multiply
    129.75x = 195.03 × 112.84
  4. Step 4: Simplify right side
    129.75x = 22,007.19
  5. Step 5: Solve for x
    x = 22,007.19/129.75
  6. Step 6: Final answer
    x = 169.61

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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.