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Finding the Fourth Proportional to 143,209.84, 197,629.48 and 79,553.56

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Solution

The fourth proportional to 143,209.84, 197,629.48 and 79,553.56 is: 109,783.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,209.84 : 197,629.48 = 79,553.56 : x
  2. Step 2: Convert to fraction form
    143,209.84/197,629.48 = 79,553.56/x
  3. Step 3: Cross multiply
    143,209.84x = 197,629.48 × 79,553.56
  4. Step 4: Simplify right side
    143,209.84x = 15,722,128,694.95
  5. Step 5: Solve for x
    x = 15,722,128,694.95/143,209.84
  6. Step 6: Final answer
    x = 109,783.86

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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.