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Finding the Fourth Proportional to 143,996.70, 198,713.72 and 79,466.43

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Solution

The fourth proportional to 143,996.70, 198,713.72 and 79,466.43 is: 109,662.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,996.70 : 198,713.72 = 79,466.43 : x
  2. Step 2: Convert to fraction form
    143,996.70/198,713.72 = 79,466.43/x
  3. Step 3: Cross multiply
    143,996.70x = 198,713.72 × 79,466.43
  4. Step 4: Simplify right side
    143,996.70x = 15,791,069,523.09
  5. Step 5: Solve for x
    x = 15,791,069,523.09/143,996.70
  6. Step 6: Final answer
    x = 109,662.72

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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.