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Finding the Fourth Proportional to 68.30, 94.23 and 52.81

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Solution

The fourth proportional to 68.30, 94.23 and 52.81 is: 72.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.30 : 94.23 = 52.81 : x
  2. Step 2: Convert to fraction form
    68.30/94.23 = 52.81/x
  3. Step 3: Cross multiply
    68.30x = 94.23 × 52.81
  4. Step 4: Simplify right side
    68.30x = 4,976.05
  5. Step 5: Solve for x
    x = 4,976.05/68.30
  6. Step 6: Final answer
    x = 72.86

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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.