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Finding the Fourth Proportional to 68,759.77, 102,979.73 and 66,867.87

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Solution

The fourth proportional to 68,759.77, 102,979.73 and 66,867.87 is: 100,146.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,759.77 : 102,979.73 = 66,867.87 : x
  2. Step 2: Convert to fraction form
    68,759.77/102,979.73 = 66,867.87/x
  3. Step 3: Cross multiply
    68,759.77x = 102,979.73 × 66,867.87
  4. Step 4: Simplify right side
    68,759.77x = 6,886,034,694.66
  5. Step 5: Solve for x
    x = 6,886,034,694.66/68,759.77
  6. Step 6: Final answer
    x = 100,146.27

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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.