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Finding the Fourth Proportional to 181.32, 250.21 and 103.70

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Solution

The fourth proportional to 181.32, 250.21 and 103.70 is: 143.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.32 : 250.21 = 103.70 : x
  2. Step 2: Convert to fraction form
    181.32/250.21 = 103.70/x
  3. Step 3: Cross multiply
    181.32x = 250.21 × 103.70
  4. Step 4: Simplify right side
    181.32x = 25,946.78
  5. Step 5: Solve for x
    x = 25,946.78/181.32
  6. Step 6: Final answer
    x = 143.10

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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.