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Finding the Fourth Proportional to 66,856,811.90, 100,285,217.85 and 66,856,811.90

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Solution

The fourth proportional to 66,856,811.90, 100,285,217.85 and 66,856,811.90 is: 100,285,217.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,856,811.90 : 100,285,217.85 = 66,856,811.90 : x
  2. Step 2: Convert to fraction form
    66,856,811.90/100,285,217.85 = 66,856,811.90/x
  3. Step 3: Cross multiply
    66,856,811.90x = 100,285,217.85 × 66,856,811.90
  4. Step 4: Simplify right side
    66,856,811.90x = 6,704,749,946,147,972
  5. Step 5: Solve for x
    x = 6,704,749,946,147,972/66,856,811.90
  6. Step 6: Final answer
    x = 100,285,217.85

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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.