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Finding the Fourth Proportional to 7,171,107.39, 9,895,775.87 and 3,907,912.03

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Solution

The fourth proportional to 7,171,107.39, 9,895,775.87 and 3,907,912.03 is: 5,392,726.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,171,107.39 : 9,895,775.87 = 3,907,912.03 : x
  2. Step 2: Convert to fraction form
    7,171,107.39/9,895,775.87 = 3,907,912.03/x
  3. Step 3: Cross multiply
    7,171,107.39x = 9,895,775.87 × 3,907,912.03
  4. Step 4: Simplify right side
    7,171,107.39x = 38,671,821,553,587.05
  5. Step 5: Solve for x
    x = 38,671,821,553,587.05/7,171,107.39
  6. Step 6: Final answer
    x = 5,392,726.60

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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.