Home / 131,289.12-196,997.94-81,355.86

Finding the Fourth Proportional to 131,289.12, 196,997.94 and 81,355.86

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Solution

The fourth proportional to 131,289.12, 196,997.94 and 81,355.86 is: 122,073.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,289.12 : 196,997.94 = 81,355.86 : x
  2. Step 2: Convert to fraction form
    131,289.12/196,997.94 = 81,355.86/x
  3. Step 3: Cross multiply
    131,289.12x = 196,997.94 × 81,355.86
  4. Step 4: Simplify right side
    131,289.12x = 16,026,936,826.93
  5. Step 5: Solve for x
    x = 16,026,936,826.93/131,289.12
  6. Step 6: Final answer
    x = 122,073.61

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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.