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Finding the Fourth Proportional to 118.49, 178.36 and 107.33

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Solution

The fourth proportional to 118.49, 178.36 and 107.33 is: 161.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.49 : 178.36 = 107.33 : x
  2. Step 2: Convert to fraction form
    118.49/178.36 = 107.33/x
  3. Step 3: Cross multiply
    118.49x = 178.36 × 107.33
  4. Step 4: Simplify right side
    118.49x = 19,142.22
  5. Step 5: Solve for x
    x = 19,142.22/118.49
  6. Step 6: Final answer
    x = 161.56

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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.