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Finding the Fourth Proportional to 68,728.56, 103,039.95 and 33,171.57

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Solution

The fourth proportional to 68,728.56, 103,039.95 and 33,171.57 is: 49,731.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,728.56 : 103,039.95 = 33,171.57 : x
  2. Step 2: Convert to fraction form
    68,728.56/103,039.95 = 33,171.57/x
  3. Step 3: Cross multiply
    68,728.56x = 103,039.95 × 33,171.57
  4. Step 4: Simplify right side
    68,728.56x = 3,417,996,914.22
  5. Step 5: Solve for x
    x = 3,417,996,914.22/68,728.56
  6. Step 6: Final answer
    x = 49,731.83

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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.