Home / 81,664.20-122,496.30-68,542.20

Finding the Fourth Proportional to 81,664.20, 122,496.30 and 68,542.20

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Solution

The fourth proportional to 81,664.20, 122,496.30 and 68,542.20 is: 102,813.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,664.20 : 122,496.30 = 68,542.20 : x
  2. Step 2: Convert to fraction form
    81,664.20/122,496.30 = 68,542.20/x
  3. Step 3: Cross multiply
    81,664.20x = 122,496.30 × 68,542.20
  4. Step 4: Simplify right side
    81,664.20x = 8,396,165,893.86
  5. Step 5: Solve for x
    x = 8,396,165,893.86/81,664.20
  6. Step 6: Final answer
    x = 102,813.30

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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.