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Finding the Fourth Proportional to 118.05, 177.78 and 107.34

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Solution

The fourth proportional to 118.05, 177.78 and 107.34 is: 161.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.05 : 177.78 = 107.34 : x
  2. Step 2: Convert to fraction form
    118.05/177.78 = 107.34/x
  3. Step 3: Cross multiply
    118.05x = 177.78 × 107.34
  4. Step 4: Simplify right side
    118.05x = 19,082.91
  5. Step 5: Solve for x
    x = 19,082.91/118.05
  6. Step 6: Final answer
    x = 161.65

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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.