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Finding the Fourth Proportional to 118.95, 177.54 and 105.28

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Solution

The fourth proportional to 118.95, 177.54 and 105.28 is: 157.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.95 : 177.54 = 105.28 : x
  2. Step 2: Convert to fraction form
    118.95/177.54 = 105.28/x
  3. Step 3: Cross multiply
    118.95x = 177.54 × 105.28
  4. Step 4: Simplify right side
    118.95x = 18,691.41
  5. Step 5: Solve for x
    x = 18,691.41/118.95
  6. Step 6: Final answer
    x = 157.14

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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.