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Finding the Fourth Proportional to 200.36, 276.42 and 121.62

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Solution

The fourth proportional to 200.36, 276.42 and 121.62 is: 167.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.36 : 276.42 = 121.62 : x
  2. Step 2: Convert to fraction form
    200.36/276.42 = 121.62/x
  3. Step 3: Cross multiply
    200.36x = 276.42 × 121.62
  4. Step 4: Simplify right side
    200.36x = 33,619.38
  5. Step 5: Solve for x
    x = 33,619.38/200.36
  6. Step 6: Final answer
    x = 167.79

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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.