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Finding the Fourth Proportional to 278,893.76, 418,336.92 and 68,533.52

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Solution

The fourth proportional to 278,893.76, 418,336.92 and 68,533.52 is: 102,799.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,893.76 : 418,336.92 = 68,533.52 : x
  2. Step 2: Convert to fraction form
    278,893.76/418,336.92 = 68,533.52/x
  3. Step 3: Cross multiply
    278,893.76x = 418,336.92 × 68,533.52
  4. Step 4: Simplify right side
    278,893.76x = 28,670,099,581.87
  5. Step 5: Solve for x
    x = 28,670,099,581.87/278,893.76
  6. Step 6: Final answer
    x = 102,799.36

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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.