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Finding the Fourth Proportional to 161.54, 241.97 and 129.09

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Solution

The fourth proportional to 161.54, 241.97 and 129.09 is: 193.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.54 : 241.97 = 129.09 : x
  2. Step 2: Convert to fraction form
    161.54/241.97 = 129.09/x
  3. Step 3: Cross multiply
    161.54x = 241.97 × 129.09
  4. Step 4: Simplify right side
    161.54x = 31,236.23
  5. Step 5: Solve for x
    x = 31,236.23/161.54
  6. Step 6: Final answer
    x = 193.37

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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.