Home / 81,144.36-121,517.80-67,017.96

Finding the Fourth Proportional to 81,144.36, 121,517.80 and 67,017.96

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Solution

The fourth proportional to 81,144.36, 121,517.80 and 67,017.96 is: 100,362.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,144.36 : 121,517.80 = 67,017.96 : x
  2. Step 2: Convert to fraction form
    81,144.36/121,517.80 = 67,017.96/x
  3. Step 3: Cross multiply
    81,144.36x = 121,517.80 × 67,017.96
  4. Step 4: Simplify right side
    81,144.36x = 8,143,875,059.69
  5. Step 5: Solve for x
    x = 8,143,875,059.69/81,144.36
  6. Step 6: Final answer
    x = 100,362.80

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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.