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Finding the Fourth Proportional to 73,168.31, 100,972.31 and 39,634.31

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Solution

The fourth proportional to 73,168.31, 100,972.31 and 39,634.31 is: 54,695.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,168.31 : 100,972.31 = 39,634.31 : x
  2. Step 2: Convert to fraction form
    73,168.31/100,972.31 = 39,634.31/x
  3. Step 3: Cross multiply
    73,168.31x = 100,972.31 × 39,634.31
  4. Step 4: Simplify right side
    73,168.31x = 4,001,967,890.22
  5. Step 5: Solve for x
    x = 4,001,967,890.22/73,168.31
  6. Step 6: Final answer
    x = 54,695.37

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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.