Home / 82,619.92-123,929.88-20,290.42

Finding the Fourth Proportional to 82,619.92, 123,929.88 and 20,290.42

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Solution

The fourth proportional to 82,619.92, 123,929.88 and 20,290.42 is: 30,435.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,619.92 : 123,929.88 = 20,290.42 : x
  2. Step 2: Convert to fraction form
    82,619.92/123,929.88 = 20,290.42/x
  3. Step 3: Cross multiply
    82,619.92x = 123,929.88 × 20,290.42
  4. Step 4: Simplify right side
    82,619.92x = 2,514,589,315.75
  5. Step 5: Solve for x
    x = 2,514,589,315.75/82,619.92
  6. Step 6: Final answer
    x = 30,435.63

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1.5x scale

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.