Home / 82,121.04-123,180.48-19,791

Finding the Fourth Proportional to 82,121.04, 123,180.48 and 19,791

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Solution

The fourth proportional to 82,121.04, 123,180.48 and 19,791 is: 29,686.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,121.04 : 123,180.48 = 19,791 : x
  2. Step 2: Convert to fraction form
    82,121.04/123,180.48 = 19,791/x
  3. Step 3: Cross multiply
    82,121.04x = 123,180.48 × 19,791
  4. Step 4: Simplify right side
    82,121.04x = 2,437,864,879.68
  5. Step 5: Solve for x
    x = 2,437,864,879.68/82,121.04
  6. Step 6: Final answer
    x = 29,686.24

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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.