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Finding the Fourth Proportional to 198.80, 274.26 and 125.10

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Solution

The fourth proportional to 198.80, 274.26 and 125.10 is: 172.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.80 : 274.26 = 125.10 : x
  2. Step 2: Convert to fraction form
    198.80/274.26 = 125.10/x
  3. Step 3: Cross multiply
    198.80x = 274.26 × 125.10
  4. Step 4: Simplify right side
    198.80x = 34,309.93
  5. Step 5: Solve for x
    x = 34,309.93/198.80
  6. Step 6: Final answer
    x = 172.59

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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.