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Finding the Fourth Proportional to 321,534.78, 481,881.71 and 131,772.97

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Solution

The fourth proportional to 321,534.78, 481,881.71 and 131,772.97 is: 197,487.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,534.78 : 481,881.71 = 131,772.97 : x
  2. Step 2: Convert to fraction form
    321,534.78/481,881.71 = 131,772.97/x
  3. Step 3: Cross multiply
    321,534.78x = 481,881.71 × 131,772.97
  4. Step 4: Simplify right side
    321,534.78x = 63,498,981,705.97
  5. Step 5: Solve for x
    x = 63,498,981,705.97/321,534.78
  6. Step 6: Final answer
    x = 197,487.13

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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.