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Finding the Fourth Proportional to 180.98, 249.87 and 125.70

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Solution

The fourth proportional to 180.98, 249.87 and 125.70 is: 173.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.98 : 249.87 = 125.70 : x
  2. Step 2: Convert to fraction form
    180.98/249.87 = 125.70/x
  3. Step 3: Cross multiply
    180.98x = 249.87 × 125.70
  4. Step 4: Simplify right side
    180.98x = 31,406.78
  5. Step 5: Solve for x
    x = 31,406.78/180.98
  6. Step 6: Final answer
    x = 173.54

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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.