Home / 82,119.97-123,179.68-19,790.47

Finding the Fourth Proportional to 82,119.97, 123,179.68 and 19,790.47

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Solution

The fourth proportional to 82,119.97, 123,179.68 and 19,790.47 is: 29,685.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,119.97 : 123,179.68 = 19,790.47 : x
  2. Step 2: Convert to fraction form
    82,119.97/123,179.68 = 19,790.47/x
  3. Step 3: Cross multiply
    82,119.97x = 123,179.68 × 19,790.47
  4. Step 4: Simplify right side
    82,119.97x = 2,437,783,940.36
  5. Step 5: Solve for x
    x = 2,437,783,940.36/82,119.97
  6. Step 6: Final answer
    x = 29,685.64

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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.