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Finding the Fourth Proportional to 179.49, 268.64 and 120.85

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Solution

The fourth proportional to 179.49, 268.64 and 120.85 is: 180.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.49 : 268.64 = 120.85 : x
  2. Step 2: Convert to fraction form
    179.49/268.64 = 120.85/x
  3. Step 3: Cross multiply
    179.49x = 268.64 × 120.85
  4. Step 4: Simplify right side
    179.49x = 32,463.87
  5. Step 5: Solve for x
    x = 32,463.87/179.49
  6. Step 6: Final answer
    x = 180.87

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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.