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Finding the Fourth Proportional to 68,680.80, 103,078.80 and 33,650.40

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Solution

The fourth proportional to 68,680.80, 103,078.80 and 33,650.40 is: 50,503.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,680.80 : 103,078.80 = 33,650.40 : x
  2. Step 2: Convert to fraction form
    68,680.80/103,078.80 = 33,650.40/x
  3. Step 3: Cross multiply
    68,680.80x = 103,078.80 × 33,650.40
  4. Step 4: Simplify right side
    68,680.80x = 3,468,642,851.52
  5. Step 5: Solve for x
    x = 3,468,642,851.52/68,680.80
  6. Step 6: Final answer
    x = 50,503.82

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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.