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Finding the Fourth Proportional to 198.95, 274.61 and 116.07

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Solution

The fourth proportional to 198.95, 274.61 and 116.07 is: 160.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.95 : 274.61 = 116.07 : x
  2. Step 2: Convert to fraction form
    198.95/274.61 = 116.07/x
  3. Step 3: Cross multiply
    198.95x = 274.61 × 116.07
  4. Step 4: Simplify right side
    198.95x = 31,873.40
  5. Step 5: Solve for x
    x = 31,873.40/198.95
  6. Step 6: Final answer
    x = 160.21

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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.