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Finding the Fourth Proportional to 71,543,431.80, 107,315,147.70 and 71,543,431.80

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Solution

The fourth proportional to 71,543,431.80, 107,315,147.70 and 71,543,431.80 is: 107,315,147.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,543,431.80 : 107,315,147.70 = 71,543,431.80 : x
  2. Step 2: Convert to fraction form
    71,543,431.80/107,315,147.70 = 71,543,431.80/x
  3. Step 3: Cross multiply
    71,543,431.80x = 107,315,147.70 × 71,543,431.80
  4. Step 4: Simplify right side
    71,543,431.80x = 7,677,693,950,581,877
  5. Step 5: Solve for x
    x = 7,677,693,950,581,877/71,543,431.80
  6. Step 6: Final answer
    x = 107,315,147.70

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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.