Home / 81,179.36-121,945.08-68,724.80

Finding the Fourth Proportional to 81,179.36, 121,945.08 and 68,724.80

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Solution

The fourth proportional to 81,179.36, 121,945.08 and 68,724.80 is: 103,236.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,179.36 : 121,945.08 = 68,724.80 : x
  2. Step 2: Convert to fraction form
    81,179.36/121,945.08 = 68,724.80/x
  3. Step 3: Cross multiply
    81,179.36x = 121,945.08 × 68,724.80
  4. Step 4: Simplify right side
    81,179.36x = 8,380,651,233.98
  5. Step 5: Solve for x
    x = 8,380,651,233.98/81,179.36
  6. Step 6: Final answer
    x = 103,236.23

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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.