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Finding the Fourth Proportional to 179.82, 248.11 and 120.69

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Solution

The fourth proportional to 179.82, 248.11 and 120.69 is: 166.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.82 : 248.11 = 120.69 : x
  2. Step 2: Convert to fraction form
    179.82/248.11 = 120.69/x
  3. Step 3: Cross multiply
    179.82x = 248.11 × 120.69
  4. Step 4: Simplify right side
    179.82x = 29,944.77
  5. Step 5: Solve for x
    x = 29,944.77/179.82
  6. Step 6: Final answer
    x = 166.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.