Home / 68,721.41-103,085.22-18,800.39

Finding the Fourth Proportional to 68,721.41, 103,085.22 and 18,800.39

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Solution

The fourth proportional to 68,721.41, 103,085.22 and 18,800.39 is: 28,201.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,721.41 : 103,085.22 = 18,800.39 : x
  2. Step 2: Convert to fraction form
    68,721.41/103,085.22 = 18,800.39/x
  3. Step 3: Cross multiply
    68,721.41x = 103,085.22 × 18,800.39
  4. Step 4: Simplify right side
    68,721.41x = 1,938,042,339.24
  5. Step 5: Solve for x
    x = 1,938,042,339.24/68,721.41
  6. Step 6: Final answer
    x = 28,201.43

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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.