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Finding the Fourth Proportional to 119.55, 179.46 and 112.80

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Solution

The fourth proportional to 119.55, 179.46 and 112.80 is: 169.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.55 : 179.46 = 112.80 : x
  2. Step 2: Convert to fraction form
    119.55/179.46 = 112.80/x
  3. Step 3: Cross multiply
    119.55x = 179.46 × 112.80
  4. Step 4: Simplify right side
    119.55x = 20,243.09
  5. Step 5: Solve for x
    x = 20,243.09/119.55
  6. Step 6: Final answer
    x = 169.33

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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.