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Finding the Fourth Proportional to 71,996.80, 108,110.40 and 54,486.40

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Solution

The fourth proportional to 71,996.80, 108,110.40 and 54,486.40 is: 81,816.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,996.80 : 108,110.40 = 54,486.40 : x
  2. Step 2: Convert to fraction form
    71,996.80/108,110.40 = 54,486.40/x
  3. Step 3: Cross multiply
    71,996.80x = 108,110.40 × 54,486.40
  4. Step 4: Simplify right side
    71,996.80x = 5,890,546,498.56
  5. Step 5: Solve for x
    x = 5,890,546,498.56/71,996.80
  6. Step 6: Final answer
    x = 81,816.78

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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.