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Finding the Fourth Proportional to 82.46, 113.74 and 68.63

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Solution

The fourth proportional to 82.46, 113.74 and 68.63 is: 94.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.46 : 113.74 = 68.63 : x
  2. Step 2: Convert to fraction form
    82.46/113.74 = 68.63/x
  3. Step 3: Cross multiply
    82.46x = 113.74 × 68.63
  4. Step 4: Simplify right side
    82.46x = 7,805.24
  5. Step 5: Solve for x
    x = 7,805.24/82.46
  6. Step 6: Final answer
    x = 94.65

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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.