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Finding the Fourth Proportional to 168.03, 231.83 and 131.28

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Solution

The fourth proportional to 168.03, 231.83 and 131.28 is: 181.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.03 : 231.83 = 131.28 : x
  2. Step 2: Convert to fraction form
    168.03/231.83 = 131.28/x
  3. Step 3: Cross multiply
    168.03x = 231.83 × 131.28
  4. Step 4: Simplify right side
    168.03x = 30,433.99
  5. Step 5: Solve for x
    x = 30,433.99/168.03
  6. Step 6: Final answer
    x = 181.12

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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.