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Finding the Fourth Proportional to 143,958.57, 198,653.79 and 79,428.57

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Solution

The fourth proportional to 143,958.57, 198,653.79 and 79,428.57 is: 109,606.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,958.57 : 198,653.79 = 79,428.57 : x
  2. Step 2: Convert to fraction form
    143,958.57/198,653.79 = 79,428.57/x
  3. Step 3: Cross multiply
    143,958.57x = 198,653.79 × 79,428.57
  4. Step 4: Simplify right side
    143,958.57x = 15,778,786,464.78
  5. Step 5: Solve for x
    x = 15,778,786,464.78/143,958.57
  6. Step 6: Final answer
    x = 109,606.44

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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.