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Finding the Fourth Proportional to 129.03, 193.29 and 109.72

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Solution

The fourth proportional to 129.03, 193.29 and 109.72 is: 164.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.03 : 193.29 = 109.72 : x
  2. Step 2: Convert to fraction form
    129.03/193.29 = 109.72/x
  3. Step 3: Cross multiply
    129.03x = 193.29 × 109.72
  4. Step 4: Simplify right side
    129.03x = 21,207.78
  5. Step 5: Solve for x
    x = 21,207.78/129.03
  6. Step 6: Final answer
    x = 164.36

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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.