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Finding the Fourth Proportional to 161.25, 241.87 and 80.18

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Solution

The fourth proportional to 161.25, 241.87 and 80.18 is: 120.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.25 : 241.87 = 80.18 : x
  2. Step 2: Convert to fraction form
    161.25/241.87 = 80.18/x
  3. Step 3: Cross multiply
    161.25x = 241.87 × 80.18
  4. Step 4: Simplify right side
    161.25x = 19,393.14
  5. Step 5: Solve for x
    x = 19,393.14/161.25
  6. Step 6: Final answer
    x = 120.27

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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.