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Finding the Fourth Proportional to 168.91, 253.38 and 82.27

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Solution

The fourth proportional to 168.91, 253.38 and 82.27 is: 123.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.91 : 253.38 = 82.27 : x
  2. Step 2: Convert to fraction form
    168.91/253.38 = 82.27/x
  3. Step 3: Cross multiply
    168.91x = 253.38 × 82.27
  4. Step 4: Simplify right side
    168.91x = 20,844.31
  5. Step 5: Solve for x
    x = 20,844.31/168.91
  6. Step 6: Final answer
    x = 123.40

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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.