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Finding the Fourth Proportional to 7,967,793.60, 11,951,690.40 and 3,178,919.70

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Solution

The fourth proportional to 7,967,793.60, 11,951,690.40 and 3,178,919.70 is: 4,768,379.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,967,793.60 : 11,951,690.40 = 3,178,919.70 : x
  2. Step 2: Convert to fraction form
    7,967,793.60/11,951,690.40 = 3,178,919.70/x
  3. Step 3: Cross multiply
    7,967,793.60x = 11,951,690.40 × 3,178,919.70
  4. Step 4: Simplify right side
    7,967,793.60x = 37,993,464,060,860.88
  5. Step 5: Solve for x
    x = 37,993,464,060,860.88/7,967,793.60
  6. Step 6: Final answer
    x = 4,768,379.55

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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.