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Finding the Fourth Proportional to 161.05, 241.66 and 79.89

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Solution

The fourth proportional to 161.05, 241.66 and 79.89 is: 119.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.05 : 241.66 = 79.89 : x
  2. Step 2: Convert to fraction form
    161.05/241.66 = 79.89/x
  3. Step 3: Cross multiply
    161.05x = 241.66 × 79.89
  4. Step 4: Simplify right side
    161.05x = 19,306.02
  5. Step 5: Solve for x
    x = 19,306.02/161.05
  6. Step 6: Final answer
    x = 119.88

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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.