Home / 80,619.96-120,932.64-28,029.90

Finding the Fourth Proportional to 80,619.96, 120,932.64 and 28,029.90

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Solution

The fourth proportional to 80,619.96, 120,932.64 and 28,029.90 is: 42,045.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,619.96 : 120,932.64 = 28,029.90 : x
  2. Step 2: Convert to fraction form
    80,619.96/120,932.64 = 28,029.90/x
  3. Step 3: Cross multiply
    80,619.96x = 120,932.64 × 28,029.90
  4. Step 4: Simplify right side
    80,619.96x = 3,389,729,805.94
  5. Step 5: Solve for x
    x = 3,389,729,805.94/80,619.96
  6. Step 6: Final answer
    x = 42,045.79

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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.