Home / 68,821.85-103,231.56-18,901.76

Finding the Fourth Proportional to 68,821.85, 103,231.56 and 18,901.76

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Solution

The fourth proportional to 68,821.85, 103,231.56 and 18,901.76 is: 28,352.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,821.85 : 103,231.56 = 18,901.76 : x
  2. Step 2: Convert to fraction form
    68,821.85/103,231.56 = 18,901.76/x
  3. Step 3: Cross multiply
    68,821.85x = 103,231.56 × 18,901.76
  4. Step 4: Simplify right side
    68,821.85x = 1,951,257,726.27
  5. Step 5: Solve for x
    x = 1,951,257,726.27/68,821.85
  6. Step 6: Final answer
    x = 28,352.30

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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.