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Finding the Fourth Proportional to 181,990.40, 272,920.80 and 82,198.40

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Solution

The fourth proportional to 181,990.40, 272,920.80 and 82,198.40 is: 123,268.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,990.40 : 272,920.80 = 82,198.40 : x
  2. Step 2: Convert to fraction form
    181,990.40/272,920.80 = 82,198.40/x
  3. Step 3: Cross multiply
    181,990.40x = 272,920.80 × 82,198.40
  4. Step 4: Simplify right side
    181,990.40x = 22,433,653,086.72
  5. Step 5: Solve for x
    x = 22,433,653,086.72/181,990.40
  6. Step 6: Final answer
    x = 123,268.33

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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.