Home / 82,619.28-123,929.04-20,289.84

Finding the Fourth Proportional to 82,619.28, 123,929.04 and 20,289.84

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Solution

The fourth proportional to 82,619.28, 123,929.04 and 20,289.84 is: 30,434.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,619.28 : 123,929.04 = 20,289.84 : x
  2. Step 2: Convert to fraction form
    82,619.28/123,929.04 = 20,289.84/x
  3. Step 3: Cross multiply
    82,619.28x = 123,929.04 × 20,289.84
  4. Step 4: Simplify right side
    82,619.28x = 2,514,500,392.95
  5. Step 5: Solve for x
    x = 2,514,500,392.95/82,619.28
  6. Step 6: Final answer
    x = 30,434.79

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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.