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Finding the Fourth Proportional to 61,041,934.60, 91,562,901.90 and 20,652,418.60

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Solution

The fourth proportional to 61,041,934.60, 91,562,901.90 and 20,652,418.60 is: 30,978,627.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,041,934.60 : 91,562,901.90 = 20,652,418.60 : x
  2. Step 2: Convert to fraction form
    61,041,934.60/91,562,901.90 = 20,652,418.60/x
  3. Step 3: Cross multiply
    61,041,934.60x = 91,562,901.90 × 20,652,418.60
  4. Step 4: Simplify right side
    61,041,934.60x = 1,890,995,378,269,535.50
  5. Step 5: Solve for x
    x = 1,890,995,378,269,535.50/61,041,934.60
  6. Step 6: Final answer
    x = 30,978,627.90

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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.