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Finding the Fourth Proportional to 68.28, 94.31 and 49.83

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Solution

The fourth proportional to 68.28, 94.31 and 49.83 is: 68.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.28 : 94.31 = 49.83 : x
  2. Step 2: Convert to fraction form
    68.28/94.31 = 49.83/x
  3. Step 3: Cross multiply
    68.28x = 94.31 × 49.83
  4. Step 4: Simplify right side
    68.28x = 4,699.47
  5. Step 5: Solve for x
    x = 4,699.47/68.28
  6. Step 6: Final answer
    x = 68.83

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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.