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Finding the Fourth Proportional to 71,982.63, 99,335.37 and 39,717.54

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Solution

The fourth proportional to 71,982.63, 99,335.37 and 39,717.54 is: 54,809.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,982.63 : 99,335.37 = 39,717.54 : x
  2. Step 2: Convert to fraction form
    71,982.63/99,335.37 = 39,717.54/x
  3. Step 3: Cross multiply
    71,982.63x = 99,335.37 × 39,717.54
  4. Step 4: Simplify right side
    71,982.63x = 3,945,356,531.39
  5. Step 5: Solve for x
    x = 3,945,356,531.39/71,982.63
  6. Step 6: Final answer
    x = 54,809.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.