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Finding the Fourth Proportional to 161.29, 241.89 and 115.26

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Solution

The fourth proportional to 161.29, 241.89 and 115.26 is: 172.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.29 : 241.89 = 115.26 : x
  2. Step 2: Convert to fraction form
    161.29/241.89 = 115.26/x
  3. Step 3: Cross multiply
    161.29x = 241.89 × 115.26
  4. Step 4: Simplify right side
    161.29x = 27,880.24
  5. Step 5: Solve for x
    x = 27,880.24/161.29
  6. Step 6: Final answer
    x = 172.86

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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.