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Finding the Fourth Proportional to 83.79, 125.82 and 65.88

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Solution

The fourth proportional to 83.79, 125.82 and 65.88 is: 98.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.79 : 125.82 = 65.88 : x
  2. Step 2: Convert to fraction form
    83.79/125.82 = 65.88/x
  3. Step 3: Cross multiply
    83.79x = 125.82 × 65.88
  4. Step 4: Simplify right side
    83.79x = 8,289.02
  5. Step 5: Solve for x
    x = 8,289.02/83.79
  6. Step 6: Final answer
    x = 98.93

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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.