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Finding the Fourth Proportional to 83.30, 125.42 and 68.82

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Solution

The fourth proportional to 83.30, 125.42 and 68.82 is: 103.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.30 : 125.42 = 68.82 : x
  2. Step 2: Convert to fraction form
    83.30/125.42 = 68.82/x
  3. Step 3: Cross multiply
    83.30x = 125.42 × 68.82
  4. Step 4: Simplify right side
    83.30x = 8,631.06
  5. Step 5: Solve for x
    x = 8,631.06/83.30
  6. Step 6: Final answer
    x = 103.62

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.