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Finding the Fourth Proportional to 65,866,998.73, 90,866,650.31 and 39,753,168.97

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Solution

The fourth proportional to 65,866,998.73, 90,866,650.31 and 39,753,168.97 is: 54,841,382.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,866,998.73 : 90,866,650.31 = 39,753,168.97 : x
  2. Step 2: Convert to fraction form
    65,866,998.73/90,866,650.31 = 39,753,168.97/x
  3. Step 3: Cross multiply
    65,866,998.73x = 90,866,650.31 × 39,753,168.97
  4. Step 4: Simplify right side
    65,866,998.73x = 3,612,237,303,234,475
  5. Step 5: Solve for x
    x = 3,612,237,303,234,475/65,866,998.73
  6. Step 6: Final answer
    x = 54,841,382.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.