Home / 131,405.80-197,233.31-81,334.43

Finding the Fourth Proportional to 131,405.80, 197,233.31 and 81,334.43

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Solution

The fourth proportional to 131,405.80, 197,233.31 and 81,334.43 is: 122,078.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,405.80 : 197,233.31 = 81,334.43 : x
  2. Step 2: Convert to fraction form
    131,405.80/197,233.31 = 81,334.43/x
  3. Step 3: Cross multiply
    131,405.80x = 197,233.31 × 81,334.43
  4. Step 4: Simplify right side
    131,405.80x = 16,041,858,845.86
  5. Step 5: Solve for x
    x = 16,041,858,845.86/131,405.80
  6. Step 6: Final answer
    x = 122,078.78

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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.