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Finding the Fourth Proportional to 82.51, 113.97 and 60.79

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Solution

The fourth proportional to 82.51, 113.97 and 60.79 is: 83.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.51 : 113.97 = 60.79 : x
  2. Step 2: Convert to fraction form
    82.51/113.97 = 60.79/x
  3. Step 3: Cross multiply
    82.51x = 113.97 × 60.79
  4. Step 4: Simplify right side
    82.51x = 6,928.24
  5. Step 5: Solve for x
    x = 6,928.24/82.51
  6. Step 6: Final answer
    x = 83.97

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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.