Home / 80,351.90-120,409.06-75,858.65

Finding the Fourth Proportional to 80,351.90, 120,409.06 and 75,858.65

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Solution

The fourth proportional to 80,351.90, 120,409.06 and 75,858.65 is: 113,675.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,351.90 : 120,409.06 = 75,858.65 : x
  2. Step 2: Convert to fraction form
    80,351.90/120,409.06 = 75,858.65/x
  3. Step 3: Cross multiply
    80,351.90x = 120,409.06 × 75,858.65
  4. Step 4: Simplify right side
    80,351.90x = 9,134,068,739.37
  5. Step 5: Solve for x
    x = 9,134,068,739.37/80,351.90
  6. Step 6: Final answer
    x = 113,675.83

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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.