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Finding the Fourth Proportional to 66,268,986.80, 99,403,480.20 and 18,399,930.80

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Solution

The fourth proportional to 66,268,986.80, 99,403,480.20 and 18,399,930.80 is: 27,599,896.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,268,986.80 : 99,403,480.20 = 18,399,930.80 : x
  2. Step 2: Convert to fraction form
    66,268,986.80/99,403,480.20 = 18,399,930.80/x
  3. Step 3: Cross multiply
    66,268,986.80x = 99,403,480.20 × 18,399,930.80
  4. Step 4: Simplify right side
    66,268,986.80x = 1,829,017,156,959,170.25
  5. Step 5: Solve for x
    x = 1,829,017,156,959,170.25/66,268,986.80
  6. Step 6: Final answer
    x = 27,599,896.20

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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.