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Finding the Fourth Proportional to 118.96, 179.28 and 105.56

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Solution

The fourth proportional to 118.96, 179.28 and 105.56 is: 159.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.96 : 179.28 = 105.56 : x
  2. Step 2: Convert to fraction form
    118.96/179.28 = 105.56/x
  3. Step 3: Cross multiply
    118.96x = 179.28 × 105.56
  4. Step 4: Simplify right side
    118.96x = 18,924.80
  5. Step 5: Solve for x
    x = 18,924.80/118.96
  6. Step 6: Final answer
    x = 159.09

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.