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Finding the Fourth Proportional to 73,778,481.80, 110,667,722.70 and 72,770,712.20

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Solution

The fourth proportional to 73,778,481.80, 110,667,722.70 and 72,770,712.20 is: 109,156,068.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,778,481.80 : 110,667,722.70 = 72,770,712.20 : x
  2. Step 2: Convert to fraction form
    73,778,481.80/110,667,722.70 = 72,770,712.20/x
  3. Step 3: Cross multiply
    73,778,481.80x = 110,667,722.70 × 72,770,712.20
  4. Step 4: Simplify right side
    73,778,481.80x = 8,053,368,998,431,107
  5. Step 5: Solve for x
    x = 8,053,368,998,431,107/73,778,481.80
  6. Step 6: Final answer
    x = 109,156,068.30

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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.