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Finding the Fourth Proportional to 209,953,866.30, 314,930,799.45 and 123,647,847.90

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Solution

The fourth proportional to 209,953,866.30, 314,930,799.45 and 123,647,847.90 is: 185,471,771.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,953,866.30 : 314,930,799.45 = 123,647,847.90 : x
  2. Step 2: Convert to fraction form
    209,953,866.30/314,930,799.45 = 123,647,847.90/x
  3. Step 3: Cross multiply
    209,953,866.30x = 314,930,799.45 × 123,647,847.90
  4. Step 4: Simplify right side
    209,953,866.30x = 38,940,515,589,419,008
  5. Step 5: Solve for x
    x = 38,940,515,589,419,008/209,953,866.30
  6. Step 6: Final answer
    x = 185,471,771.85

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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.