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Finding the Fourth Proportional to 198.87, 274.45 and 116

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Solution

The fourth proportional to 198.87, 274.45 and 116 is: 160.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.87 : 274.45 = 116 : x
  2. Step 2: Convert to fraction form
    198.87/274.45 = 116/x
  3. Step 3: Cross multiply
    198.87x = 274.45 × 116
  4. Step 4: Simplify right side
    198.87x = 31,835.62
  5. Step 5: Solve for x
    x = 31,835.62/198.87
  6. Step 6: Final answer
    x = 160.08

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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.