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Finding the Fourth Proportional to 129.53, 194.29 and 109.33

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Solution

The fourth proportional to 129.53, 194.29 and 109.33 is: 163.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.53 : 194.29 = 109.33 : x
  2. Step 2: Convert to fraction form
    129.53/194.29 = 109.33/x
  3. Step 3: Cross multiply
    129.53x = 194.29 × 109.33
  4. Step 4: Simplify right side
    129.53x = 21,240.97
  5. Step 5: Solve for x
    x = 21,240.97/129.53
  6. Step 6: Final answer
    x = 163.98

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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.