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Finding the Fourth Proportional to 278,800.93, 418,209.60 and 68,438.89

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Solution

The fourth proportional to 278,800.93, 418,209.60 and 68,438.89 is: 102,660.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,800.93 : 418,209.60 = 68,438.89 : x
  2. Step 2: Convert to fraction form
    278,800.93/418,209.60 = 68,438.89/x
  3. Step 3: Cross multiply
    278,800.93x = 418,209.60 × 68,438.89
  4. Step 4: Simplify right side
    278,800.93x = 28,621,800,811.34
  5. Step 5: Solve for x
    x = 28,621,800,811.34/278,800.93
  6. Step 6: Final answer
    x = 102,660.35

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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.