Home / 81,950,707.80-122,923,218.60-20,540,403.90

Finding the Fourth Proportional to 81,950,707.80, 122,923,218.60 and 20,540,403.90

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Solution

The fourth proportional to 81,950,707.80, 122,923,218.60 and 20,540,403.90 is: 30,809,893.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,950,707.80 : 122,923,218.60 = 20,540,403.90 : x
  2. Step 2: Convert to fraction form
    81,950,707.80/122,923,218.60 = 20,540,403.90/x
  3. Step 3: Cross multiply
    81,950,707.80x = 122,923,218.60 × 20,540,403.90
  4. Step 4: Simplify right side
    81,950,707.80x = 2,524,892,558,731,992
  5. Step 5: Solve for x
    x = 2,524,892,558,731,992/81,950,707.80
  6. Step 6: Final answer
    x = 30,809,893.25

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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.