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Finding the Fourth Proportional to 181.13, 249.83 and 122.81

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Solution

The fourth proportional to 181.13, 249.83 and 122.81 is: 169.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.13 : 249.83 = 122.81 : x
  2. Step 2: Convert to fraction form
    181.13/249.83 = 122.81/x
  3. Step 3: Cross multiply
    181.13x = 249.83 × 122.81
  4. Step 4: Simplify right side
    181.13x = 30,681.62
  5. Step 5: Solve for x
    x = 30,681.62/181.13
  6. Step 6: Final answer
    x = 169.39

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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.