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Finding the Fourth Proportional to 181.64, 250.42 and 129.80

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Solution

The fourth proportional to 181.64, 250.42 and 129.80 is: 178.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.64 : 250.42 = 129.80 : x
  2. Step 2: Convert to fraction form
    181.64/250.42 = 129.80/x
  3. Step 3: Cross multiply
    181.64x = 250.42 × 129.80
  4. Step 4: Simplify right side
    181.64x = 32,504.52
  5. Step 5: Solve for x
    x = 32,504.52/181.64
  6. Step 6: Final answer
    x = 178.95

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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.