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Finding the Fourth Proportional to 120.24, 179 and 119.88

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Solution

The fourth proportional to 120.24, 179 and 119.88 is: 178.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.24 : 179 = 119.88 : x
  2. Step 2: Convert to fraction form
    120.24/179 = 119.88/x
  3. Step 3: Cross multiply
    120.24x = 179 × 119.88
  4. Step 4: Simplify right side
    120.24x = 21,458.52
  5. Step 5: Solve for x
    x = 21,458.52/120.24
  6. Step 6: Final answer
    x = 178.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.