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Finding the Fourth Proportional to 129.89, 195.33 and 103.93

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Solution

The fourth proportional to 129.89, 195.33 and 103.93 is: 156.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.89 : 195.33 = 103.93 : x
  2. Step 2: Convert to fraction form
    129.89/195.33 = 103.93/x
  3. Step 3: Cross multiply
    129.89x = 195.33 × 103.93
  4. Step 4: Simplify right side
    129.89x = 20,299.67
  5. Step 5: Solve for x
    x = 20,299.67/129.89
  6. Step 6: Final answer
    x = 156.28

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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.