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Finding the Fourth Proportional to 66,171,693.60, 99,257,540.40 and 20,113,473.60

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Solution

The fourth proportional to 66,171,693.60, 99,257,540.40 and 20,113,473.60 is: 30,170,210.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,171,693.60 : 99,257,540.40 = 20,113,473.60 : x
  2. Step 2: Convert to fraction form
    66,171,693.60/99,257,540.40 = 20,113,473.60/x
  3. Step 3: Cross multiply
    66,171,693.60x = 99,257,540.40 × 20,113,473.60
  4. Step 4: Simplify right side
    66,171,693.60x = 1,996,413,918,436,333.75
  5. Step 5: Solve for x
    x = 1,996,413,918,436,333.75/66,171,693.60
  6. Step 6: Final answer
    x = 30,170,210.40

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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.