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Finding the Fourth Proportional to 81,309.38, 121,963.37 and 63,554.97

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Solution

The fourth proportional to 81,309.38, 121,963.37 and 63,554.97 is: 95,331.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,309.38 : 121,963.37 = 63,554.97 : x
  2. Step 2: Convert to fraction form
    81,309.38/121,963.37 = 63,554.97/x
  3. Step 3: Cross multiply
    81,309.38x = 121,963.37 × 63,554.97
  4. Step 4: Simplify right side
    81,309.38x = 7,751,378,003.67
  5. Step 5: Solve for x
    x = 7,751,378,003.67/81,309.38
  6. Step 6: Final answer
    x = 95,331.91

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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.