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Finding the Fourth Proportional to 81,997, 122,998.38 and 46,920.52

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Solution

The fourth proportional to 81,997, 122,998.38 and 46,920.52 is: 70,382.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,997 : 122,998.38 = 46,920.52 : x
  2. Step 2: Convert to fraction form
    81,997/122,998.38 = 46,920.52/x
  3. Step 3: Cross multiply
    81,997x = 122,998.38 × 46,920.52
  4. Step 4: Simplify right side
    81,997x = 5,771,147,948.76
  5. Step 5: Solve for x
    x = 5,771,147,948.76/81,997
  6. Step 6: Final answer
    x = 70,382.43

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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.