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Finding the Fourth Proportional to 143.46, 198.18 and 126.99

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Solution

The fourth proportional to 143.46, 198.18 and 126.99 is: 175.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.46 : 198.18 = 126.99 : x
  2. Step 2: Convert to fraction form
    143.46/198.18 = 126.99/x
  3. Step 3: Cross multiply
    143.46x = 198.18 × 126.99
  4. Step 4: Simplify right side
    143.46x = 25,166.88
  5. Step 5: Solve for x
    x = 25,166.88/143.46
  6. Step 6: Final answer
    x = 175.43

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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.