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Finding the Fourth Proportional to 61,042,578.60, 91,563,867.90 and 20,653,062.60

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Solution

The fourth proportional to 61,042,578.60, 91,563,867.90 and 20,653,062.60 is: 30,979,593.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,042,578.60 : 91,563,867.90 = 20,653,062.60 : x
  2. Step 2: Convert to fraction form
    61,042,578.60/91,563,867.90 = 20,653,062.60/x
  3. Step 3: Cross multiply
    61,042,578.60x = 91,563,867.90 × 20,653,062.60
  4. Step 4: Simplify right side
    61,042,578.60x = 1,891,074,295,636,830.75
  5. Step 5: Solve for x
    x = 1,891,074,295,636,830.75/61,042,578.60
  6. Step 6: Final answer
    x = 30,979,593.90

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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.