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Finding the Fourth Proportional to 168.40, 231.78 and 146.44

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Solution

The fourth proportional to 168.40, 231.78 and 146.44 is: 201.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.40 : 231.78 = 146.44 : x
  2. Step 2: Convert to fraction form
    168.40/231.78 = 146.44/x
  3. Step 3: Cross multiply
    168.40x = 231.78 × 146.44
  4. Step 4: Simplify right side
    168.40x = 33,941.86
  5. Step 5: Solve for x
    x = 33,941.86/168.40
  6. Step 6: Final answer
    x = 201.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.