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Finding the Fourth Proportional to 143,507.28, 198,034.61 and 79,843.71

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Solution

The fourth proportional to 143,507.28, 198,034.61 and 79,843.71 is: 110,181.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,507.28 : 198,034.61 = 79,843.71 : x
  2. Step 2: Convert to fraction form
    143,507.28/198,034.61 = 79,843.71/x
  3. Step 3: Cross multiply
    143,507.28x = 198,034.61 × 79,843.71
  4. Step 4: Simplify right side
    143,507.28x = 15,811,817,571.58
  5. Step 5: Solve for x
    x = 15,811,817,571.58/143,507.28
  6. Step 6: Final answer
    x = 110,181.29

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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.