Home / 120,388.29-166,163.49-80,103.75

Finding the Fourth Proportional to 120,388.29, 166,163.49 and 80,103.75

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Solution

The fourth proportional to 120,388.29, 166,163.49 and 80,103.75 is: 110,561.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,388.29 : 166,163.49 = 80,103.75 : x
  2. Step 2: Convert to fraction form
    120,388.29/166,163.49 = 80,103.75/x
  3. Step 3: Cross multiply
    120,388.29x = 166,163.49 × 80,103.75
  4. Step 4: Simplify right side
    120,388.29x = 13,310,318,662.09
  5. Step 5: Solve for x
    x = 13,310,318,662.09/120,388.29
  6. Step 6: Final answer
    x = 110,561.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.