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Finding the Fourth Proportional to 49.90, 68.84 and 36.11

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Solution

The fourth proportional to 49.90, 68.84 and 36.11 is: 49.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.90 : 68.84 = 36.11 : x
  2. Step 2: Convert to fraction form
    49.90/68.84 = 36.11/x
  3. Step 3: Cross multiply
    49.90x = 68.84 × 36.11
  4. Step 4: Simplify right side
    49.90x = 2,485.29
  5. Step 5: Solve for x
    x = 2,485.29/49.90
  6. Step 6: Final answer
    x = 49.81

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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.