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Finding the Fourth Proportional to 278,798.95, 418,206.62 and 68,436.88

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Solution

The fourth proportional to 278,798.95, 418,206.62 and 68,436.88 is: 102,657.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,798.95 : 418,206.62 = 68,436.88 : x
  2. Step 2: Convert to fraction form
    278,798.95/418,206.62 = 68,436.88/x
  3. Step 3: Cross multiply
    278,798.95x = 418,206.62 × 68,436.88
  4. Step 4: Simplify right side
    278,798.95x = 28,620,753,834.93
  5. Step 5: Solve for x
    x = 28,620,753,834.93/278,798.95
  6. Step 6: Final answer
    x = 102,657.32

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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.