Home / 81,917.76-122,906.26-28,617.64

Finding the Fourth Proportional to 81,917.76, 122,906.26 and 28,617.64

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Solution

The fourth proportional to 81,917.76, 122,906.26 and 28,617.64 is: 42,936.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,917.76 : 122,906.26 = 28,617.64 : x
  2. Step 2: Convert to fraction form
    81,917.76/122,906.26 = 28,617.64/x
  3. Step 3: Cross multiply
    81,917.76x = 122,906.26 × 28,617.64
  4. Step 4: Simplify right side
    81,917.76x = 3,517,287,102.43
  5. Step 5: Solve for x
    x = 3,517,287,102.43/81,917.76
  6. Step 6: Final answer
    x = 42,936.81

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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.