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Finding the Fourth Proportional to 50.21, 68.36 and 49.49

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Solution

The fourth proportional to 50.21, 68.36 and 49.49 is: 67.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.21 : 68.36 = 49.49 : x
  2. Step 2: Convert to fraction form
    50.21/68.36 = 49.49/x
  3. Step 3: Cross multiply
    50.21x = 68.36 × 49.49
  4. Step 4: Simplify right side
    50.21x = 3,383.43
  5. Step 5: Solve for x
    x = 3,383.43/50.21
  6. Step 6: Final answer
    x = 67.39

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.