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Finding the Fourth Proportional to 181.04, 249.68 and 128.48

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Solution

The fourth proportional to 181.04, 249.68 and 128.48 is: 177.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.04 : 249.68 = 128.48 : x
  2. Step 2: Convert to fraction form
    181.04/249.68 = 128.48/x
  3. Step 3: Cross multiply
    181.04x = 249.68 × 128.48
  4. Step 4: Simplify right side
    181.04x = 32,078.89
  5. Step 5: Solve for x
    x = 32,078.89/181.04
  6. Step 6: Final answer
    x = 177.19

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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.