Home / 68,738.09-103,107.06-18,818.60

Finding the Fourth Proportional to 68,738.09, 103,107.06 and 18,818.60

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Solution

The fourth proportional to 68,738.09, 103,107.06 and 18,818.60 is: 28,227.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,738.09 : 103,107.06 = 18,818.60 : x
  2. Step 2: Convert to fraction form
    68,738.09/103,107.06 = 18,818.60/x
  3. Step 3: Cross multiply
    68,738.09x = 103,107.06 × 18,818.60
  4. Step 4: Simplify right side
    68,738.09x = 1,940,330,003.78
  5. Step 5: Solve for x
    x = 1,940,330,003.78/68,738.09
  6. Step 6: Final answer
    x = 28,227.87

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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.