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Finding the Fourth Proportional to 68,659.92, 102,963.96 and 31,698

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Solution

The fourth proportional to 68,659.92, 102,963.96 and 31,698 is: 47,535.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,659.92 : 102,963.96 = 31,698 : x
  2. Step 2: Convert to fraction form
    68,659.92/102,963.96 = 31,698/x
  3. Step 3: Cross multiply
    68,659.92x = 102,963.96 × 31,698
  4. Step 4: Simplify right side
    68,659.92x = 3,263,751,604.08
  5. Step 5: Solve for x
    x = 3,263,751,604.08/68,659.92
  6. Step 6: Final answer
    x = 47,535.03

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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.