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Finding the Fourth Proportional to 154,801,675.80, 231,978,564.90 and 68,469,413.40

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Solution

The fourth proportional to 154,801,675.80, 231,978,564.90 and 68,469,413.40 is: 102,605,066.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,801,675.80 : 231,978,564.90 = 68,469,413.40 : x
  2. Step 2: Convert to fraction form
    154,801,675.80/231,978,564.90 = 68,469,413.40/x
  3. Step 3: Cross multiply
    154,801,675.80x = 231,978,564.90 × 68,469,413.40
  4. Step 4: Simplify right side
    154,801,675.80x = 15,883,436,260,076,832
  5. Step 5: Solve for x
    x = 15,883,436,260,076,832/154,801,675.80
  6. Step 6: Final answer
    x = 102,605,066.63

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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.