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Finding the Fourth Proportional to 67,991,646.80, 101,987,470.20 and 54,554,718.80

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Solution

The fourth proportional to 67,991,646.80, 101,987,470.20 and 54,554,718.80 is: 81,832,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,991,646.80 : 101,987,470.20 = 54,554,718.80 : x
  2. Step 2: Convert to fraction form
    67,991,646.80/101,987,470.20 = 54,554,718.80/x
  3. Step 3: Cross multiply
    67,991,646.80x = 101,987,470.20 × 54,554,718.80
  4. Step 4: Simplify right side
    67,991,646.80x = 5,563,897,757,884,380
  5. Step 5: Solve for x
    x = 5,563,897,757,884,380/67,991,646.80
  6. Step 6: Final answer
    x = 81,832,078.20

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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.