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Finding the Fourth Proportional to 143,286.81, 197,726.73 and 79,620.81

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Solution

The fourth proportional to 143,286.81, 197,726.73 and 79,620.81 is: 109,871.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,286.81 : 197,726.73 = 79,620.81 : x
  2. Step 2: Convert to fraction form
    143,286.81/197,726.73 = 79,620.81/x
  3. Step 3: Cross multiply
    143,286.81x = 197,726.73 × 79,620.81
  4. Step 4: Simplify right side
    143,286.81x = 15,743,162,401.25
  5. Step 5: Solve for x
    x = 15,743,162,401.25/143,286.81
  6. Step 6: Final answer
    x = 109,871.68

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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.