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Finding the Fourth Proportional to 200.09, 276.11 and 112.78

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Solution

The fourth proportional to 200.09, 276.11 and 112.78 is: 155.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.09 : 276.11 = 112.78 : x
  2. Step 2: Convert to fraction form
    200.09/276.11 = 112.78/x
  3. Step 3: Cross multiply
    200.09x = 276.11 × 112.78
  4. Step 4: Simplify right side
    200.09x = 31,137.74
  5. Step 5: Solve for x
    x = 31,137.74/200.09
  6. Step 6: Final answer
    x = 155.62

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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.