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Finding the Fourth Proportional to 68,722.80, 103,069.80 and 33,687.60

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Solution

The fourth proportional to 68,722.80, 103,069.80 and 33,687.60 is: 50,524.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,722.80 : 103,069.80 = 33,687.60 : x
  2. Step 2: Convert to fraction form
    68,722.80/103,069.80 = 33,687.60/x
  3. Step 3: Cross multiply
    68,722.80x = 103,069.80 × 33,687.60
  4. Step 4: Simplify right side
    68,722.80x = 3,472,174,194.48
  5. Step 5: Solve for x
    x = 3,472,174,194.48/68,722.80
  6. Step 6: Final answer
    x = 50,524.34

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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.