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Finding the Fourth Proportional to 118.70, 178.01 and 40.60

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Solution

The fourth proportional to 118.70, 178.01 and 40.60 is: 60.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.70 : 178.01 = 40.60 : x
  2. Step 2: Convert to fraction form
    118.70/178.01 = 40.60/x
  3. Step 3: Cross multiply
    118.70x = 178.01 × 40.60
  4. Step 4: Simplify right side
    118.70x = 7,227.21
  5. Step 5: Solve for x
    x = 7,227.21/118.70
  6. Step 6: Final answer
    x = 60.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.