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Finding the Fourth Proportional to 278,778.34, 418,193.43 and 79,103.62

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Solution

The fourth proportional to 278,778.34, 418,193.43 and 79,103.62 is: 118,662.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,778.34 : 418,193.43 = 79,103.62 : x
  2. Step 2: Convert to fraction form
    278,778.34/418,193.43 = 79,103.62/x
  3. Step 3: Cross multiply
    278,778.34x = 418,193.43 × 79,103.62
  4. Step 4: Simplify right side
    278,778.34x = 33,080,614,173.22
  5. Step 5: Solve for x
    x = 33,080,614,173.22/278,778.34
  6. Step 6: Final answer
    x = 118,662.78

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1.5x scale

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.