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Finding the Fourth Proportional to 161.31, 241.38 and 109.92

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Solution

The fourth proportional to 161.31, 241.38 and 109.92 is: 164.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.31 : 241.38 = 109.92 : x
  2. Step 2: Convert to fraction form
    161.31/241.38 = 109.92/x
  3. Step 3: Cross multiply
    161.31x = 241.38 × 109.92
  4. Step 4: Simplify right side
    161.31x = 26,532.49
  5. Step 5: Solve for x
    x = 26,532.49/161.31
  6. Step 6: Final answer
    x = 164.48

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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.