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Finding the Fourth Proportional to 68,803.76, 103,205.73 and 18,884.54

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Solution

The fourth proportional to 68,803.76, 103,205.73 and 18,884.54 is: 28,326.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,803.76 : 103,205.73 = 18,884.54 : x
  2. Step 2: Convert to fraction form
    68,803.76/103,205.73 = 18,884.54/x
  3. Step 3: Cross multiply
    68,803.76x = 103,205.73 × 18,884.54
  4. Step 4: Simplify right side
    68,803.76x = 1,948,992,736.41
  5. Step 5: Solve for x
    x = 1,948,992,736.41/68,803.76
  6. Step 6: Final answer
    x = 28,326.83

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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.