Home / 107,940.40-161,716.20-66,338.80

Finding the Fourth Proportional to 107,940.40, 161,716.20 and 66,338.80

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Solution

The fourth proportional to 107,940.40, 161,716.20 and 66,338.80 is: 99,388.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,940.40 : 161,716.20 = 66,338.80 : x
  2. Step 2: Convert to fraction form
    107,940.40/161,716.20 = 66,338.80/x
  3. Step 3: Cross multiply
    107,940.40x = 161,716.20 × 66,338.80
  4. Step 4: Simplify right side
    107,940.40x = 10,728,058,648.56
  5. Step 5: Solve for x
    x = 10,728,058,648.56/107,940.40
  6. Step 6: Final answer
    x = 99,388.72

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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.