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Finding the Fourth Proportional to 278,773.59, 418,176.27 and 79,078.35

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Solution

The fourth proportional to 278,773.59, 418,176.27 and 79,078.35 is: 118,622.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,773.59 : 418,176.27 = 79,078.35 : x
  2. Step 2: Convert to fraction form
    278,773.59/418,176.27 = 79,078.35/x
  3. Step 3: Cross multiply
    278,773.59x = 418,176.27 × 79,078.35
  4. Step 4: Simplify right side
    278,773.59x = 33,068,689,440.75
  5. Step 5: Solve for x
    x = 33,068,689,440.75/278,773.59
  6. Step 6: Final answer
    x = 118,622.03

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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.