Home / 218,933.30-328,395.77-76,739.12

Finding the Fourth Proportional to 218,933.30, 328,395.77 and 76,739.12

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Solution

The fourth proportional to 218,933.30, 328,395.77 and 76,739.12 is: 115,107.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,933.30 : 328,395.77 = 76,739.12 : x
  2. Step 2: Convert to fraction form
    218,933.30/328,395.77 = 76,739.12/x
  3. Step 3: Cross multiply
    218,933.30x = 328,395.77 × 76,739.12
  4. Step 4: Simplify right side
    218,933.30x = 25,200,800,375.85
  5. Step 5: Solve for x
    x = 25,200,800,375.85/218,933.30
  6. Step 6: Final answer
    x = 115,107.21

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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.