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Finding the Fourth Proportional to 181.38, 250.30 and 103.75

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Solution

The fourth proportional to 181.38, 250.30 and 103.75 is: 143.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.38 : 250.30 = 103.75 : x
  2. Step 2: Convert to fraction form
    181.38/250.30 = 103.75/x
  3. Step 3: Cross multiply
    181.38x = 250.30 × 103.75
  4. Step 4: Simplify right side
    181.38x = 25,968.37
  5. Step 5: Solve for x
    x = 25,968.37/181.38
  6. Step 6: Final answer
    x = 143.18

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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.