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Finding the Fourth Proportional to 179.90, 248.19 and 138.38

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Solution

The fourth proportional to 179.90, 248.19 and 138.38 is: 190.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.90 : 248.19 = 138.38 : x
  2. Step 2: Convert to fraction form
    179.90/248.19 = 138.38/x
  3. Step 3: Cross multiply
    179.90x = 248.19 × 138.38
  4. Step 4: Simplify right side
    179.90x = 34,344.53
  5. Step 5: Solve for x
    x = 34,344.53/179.90
  6. Step 6: Final answer
    x = 190.91

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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.