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Finding the Fourth Proportional to 83.79, 125.75 and 60.97

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Solution

The fourth proportional to 83.79, 125.75 and 60.97 is: 91.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.79 : 125.75 = 60.97 : x
  2. Step 2: Convert to fraction form
    83.79/125.75 = 60.97/x
  3. Step 3: Cross multiply
    83.79x = 125.75 × 60.97
  4. Step 4: Simplify right side
    83.79x = 7,666.98
  5. Step 5: Solve for x
    x = 7,666.98/83.79
  6. Step 6: Final answer
    x = 91.50

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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.