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Finding the Fourth Proportional to 333,789.66, 500,679.90 and 81,072

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Solution

The fourth proportional to 333,789.66, 500,679.90 and 81,072 is: 121,606.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,789.66 : 500,679.90 = 81,072 : x
  2. Step 2: Convert to fraction form
    333,789.66/500,679.90 = 81,072/x
  3. Step 3: Cross multiply
    333,789.66x = 500,679.90 × 81,072
  4. Step 4: Simplify right side
    333,789.66x = 40,591,120,852.80
  5. Step 5: Solve for x
    x = 40,591,120,852.80/333,789.66
  6. Step 6: Final answer
    x = 121,606.89

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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.