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Finding the Fourth Proportional to 181.79, 250.97 and 139.70

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Solution

The fourth proportional to 181.79, 250.97 and 139.70 is: 192.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.79 : 250.97 = 139.70 : x
  2. Step 2: Convert to fraction form
    181.79/250.97 = 139.70/x
  3. Step 3: Cross multiply
    181.79x = 250.97 × 139.70
  4. Step 4: Simplify right side
    181.79x = 35,058.56
  5. Step 5: Solve for x
    x = 35,058.56/181.79
  6. Step 6: Final answer
    x = 192.86

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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.