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Finding the Fourth Proportional to 143,991.97, 215,963.34 and 38,786.34

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Solution

The fourth proportional to 143,991.97, 215,963.34 and 38,786.34 is: 58,172.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,991.97 : 215,963.34 = 38,786.34 : x
  2. Step 2: Convert to fraction form
    143,991.97/215,963.34 = 38,786.34/x
  3. Step 3: Cross multiply
    143,991.97x = 215,963.34 × 38,786.34
  4. Step 4: Simplify right side
    143,991.97x = 8,376,426,452.96
  5. Step 5: Solve for x
    x = 8,376,426,452.96/143,991.97
  6. Step 6: Final answer
    x = 58,172.87

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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.