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Finding the Fourth Proportional to 68,724.80, 103,072.80 and 33,689.60

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Solution

The fourth proportional to 68,724.80, 103,072.80 and 33,689.60 is: 50,527.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,724.80 : 103,072.80 = 33,689.60 : x
  2. Step 2: Convert to fraction form
    68,724.80/103,072.80 = 33,689.60/x
  3. Step 3: Cross multiply
    68,724.80x = 103,072.80 × 33,689.60
  4. Step 4: Simplify right side
    68,724.80x = 3,472,481,402.88
  5. Step 5: Solve for x
    x = 3,472,481,402.88/68,724.80
  6. Step 6: Final answer
    x = 50,527.34

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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.