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Finding the Fourth Proportional to 333,843.09, 500,765.25 and 81,123.79

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Solution

The fourth proportional to 333,843.09, 500,765.25 and 81,123.79 is: 121,685.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,843.09 : 500,765.25 = 81,123.79 : x
  2. Step 2: Convert to fraction form
    333,843.09/500,765.25 = 81,123.79/x
  3. Step 3: Cross multiply
    333,843.09x = 500,765.25 × 81,123.79
  4. Step 4: Simplify right side
    333,843.09x = 40,623,974,980.30
  5. Step 5: Solve for x
    x = 40,623,974,980.30/333,843.09
  6. Step 6: Final answer
    x = 121,685.83

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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.