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Finding the Fourth Proportional to 66,561,903.60, 99,795,616.20 and 25,605,517.20

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Solution

The fourth proportional to 66,561,903.60, 99,795,616.20 and 25,605,517.20 is: 38,390,103.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,561,903.60 : 99,795,616.20 = 25,605,517.20 : x
  2. Step 2: Convert to fraction form
    66,561,903.60/99,795,616.20 = 25,605,517.20/x
  3. Step 3: Cross multiply
    66,561,903.60x = 99,795,616.20 × 25,605,517.20
  4. Step 4: Simplify right side
    66,561,903.60x = 2,555,318,367,093,698.50
  5. Step 5: Solve for x
    x = 2,555,318,367,093,698.50/66,561,903.60
  6. Step 6: Final answer
    x = 38,390,103.48

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1.5x scale

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.