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Finding the Fourth Proportional to 67,991,619.80, 101,987,429.70 and 54,554,691.80

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Solution

The fourth proportional to 67,991,619.80, 101,987,429.70 and 54,554,691.80 is: 81,832,037.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,991,619.80 : 101,987,429.70 = 54,554,691.80 : x
  2. Step 2: Convert to fraction form
    67,991,619.80/101,987,429.70 = 54,554,691.80/x
  3. Step 3: Cross multiply
    67,991,619.80x = 101,987,429.70 × 54,554,691.80
  4. Step 4: Simplify right side
    67,991,619.80x = 5,563,892,794,757,666
  5. Step 5: Solve for x
    x = 5,563,892,794,757,666/67,991,619.80
  6. Step 6: Final answer
    x = 81,832,037.70

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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.