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Finding the Fourth Proportional to 118.92, 177.63 and 105.48

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Solution

The fourth proportional to 118.92, 177.63 and 105.48 is: 157.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.92 : 177.63 = 105.48 : x
  2. Step 2: Convert to fraction form
    118.92/177.63 = 105.48/x
  3. Step 3: Cross multiply
    118.92x = 177.63 × 105.48
  4. Step 4: Simplify right side
    118.92x = 18,736.41
  5. Step 5: Solve for x
    x = 18,736.41/118.92
  6. Step 6: Final answer
    x = 157.55

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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.