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Finding the Fourth Proportional to 83.82, 125.66 and 56.82

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Solution

The fourth proportional to 83.82, 125.66 and 56.82 is: 85.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.82 : 125.66 = 56.82 : x
  2. Step 2: Convert to fraction form
    83.82/125.66 = 56.82/x
  3. Step 3: Cross multiply
    83.82x = 125.66 × 56.82
  4. Step 4: Simplify right side
    83.82x = 7,140.00
  5. Step 5: Solve for x
    x = 7,140.00/83.82
  6. Step 6: Final answer
    x = 85.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.