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Finding the Fourth Proportional to 129.03, 193.11 and 98.42

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Solution

The fourth proportional to 129.03, 193.11 and 98.42 is: 147.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.03 : 193.11 = 98.42 : x
  2. Step 2: Convert to fraction form
    129.03/193.11 = 98.42/x
  3. Step 3: Cross multiply
    129.03x = 193.11 × 98.42
  4. Step 4: Simplify right side
    129.03x = 19,005.89
  5. Step 5: Solve for x
    x = 19,005.89/129.03
  6. Step 6: Final answer
    x = 147.30

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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.