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Finding the Fourth Proportional to 181.31, 250.25 and 103.70

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Solution

The fourth proportional to 181.31, 250.25 and 103.70 is: 143.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.31 : 250.25 = 103.70 : x
  2. Step 2: Convert to fraction form
    181.31/250.25 = 103.70/x
  3. Step 3: Cross multiply
    181.31x = 250.25 × 103.70
  4. Step 4: Simplify right side
    181.31x = 25,949.16
  5. Step 5: Solve for x
    x = 25,949.16/181.31
  6. Step 6: Final answer
    x = 143.12

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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.