Home / 81,847.17-122,765.22-31,917.96

Finding the Fourth Proportional to 81,847.17, 122,765.22 and 31,917.96

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Solution

The fourth proportional to 81,847.17, 122,765.22 and 31,917.96 is: 47,874.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,847.17 : 122,765.22 = 31,917.96 : x
  2. Step 2: Convert to fraction form
    81,847.17/122,765.22 = 31,917.96/x
  3. Step 3: Cross multiply
    81,847.17x = 122,765.22 × 31,917.96
  4. Step 4: Simplify right side
    81,847.17x = 3,918,415,381.35
  5. Step 5: Solve for x
    x = 3,918,415,381.35/81,847.17
  6. Step 6: Final answer
    x = 47,874.78

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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.