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Finding the Fourth Proportional to 19,788,331,980.80, 29,682,497,971.20 and 19,788,331,980.80

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Solution

The fourth proportional to 19,788,331,980.80, 29,682,497,971.20 and 19,788,331,980.80 is: 29,682,497,971.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,788,331,980.80 : 29,682,497,971.20 = 19,788,331,980.80 : x
  2. Step 2: Convert to fraction form
    19,788,331,980.80/29,682,497,971.20 = 19,788,331,980.80/x
  3. Step 3: Cross multiply
    19,788,331,980.80x = 29,682,497,971.20 × 19,788,331,980.80
  4. Step 4: Simplify right side
    19,788,331,980.80x = 587,367,123,873,528,086,528
  5. Step 5: Solve for x
    x = 587,367,123,873,528,086,528/19,788,331,980.80
  6. Step 6: Final answer
    x = 29,682,497,971.20

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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.