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Finding the Fourth Proportional to 180.84, 249.46 and 138.80

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Solution

The fourth proportional to 180.84, 249.46 and 138.80 is: 191.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.84 : 249.46 = 138.80 : x
  2. Step 2: Convert to fraction form
    180.84/249.46 = 138.80/x
  3. Step 3: Cross multiply
    180.84x = 249.46 × 138.80
  4. Step 4: Simplify right side
    180.84x = 34,624.70
  5. Step 5: Solve for x
    x = 34,624.70/180.84
  6. Step 6: Final answer
    x = 191.46

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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.