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Finding the Fourth Proportional to 68,339.60, 102,528.60 and 33,280.40

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Solution

The fourth proportional to 68,339.60, 102,528.60 and 33,280.40 is: 49,929.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,339.60 : 102,528.60 = 33,280.40 : x
  2. Step 2: Convert to fraction form
    68,339.60/102,528.60 = 33,280.40/x
  3. Step 3: Cross multiply
    68,339.60x = 102,528.60 × 33,280.40
  4. Step 4: Simplify right side
    68,339.60x = 3,412,192,819.44
  5. Step 5: Solve for x
    x = 3,412,192,819.44/68,339.60
  6. Step 6: Final answer
    x = 49,929.95

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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.