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Finding the Fourth Proportional to 161.41, 241.89 and 115.78

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Solution

The fourth proportional to 161.41, 241.89 and 115.78 is: 173.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.41 : 241.89 = 115.78 : x
  2. Step 2: Convert to fraction form
    161.41/241.89 = 115.78/x
  3. Step 3: Cross multiply
    161.41x = 241.89 × 115.78
  4. Step 4: Simplify right side
    161.41x = 28,006.02
  5. Step 5: Solve for x
    x = 28,006.02/161.41
  6. Step 6: Final answer
    x = 173.51

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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.