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Finding the Fourth Proportional to 143,956.62, 198,660.83 and 79,425.86

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Solution

The fourth proportional to 143,956.62, 198,660.83 and 79,425.86 is: 109,608.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,956.62 : 198,660.83 = 79,425.86 : x
  2. Step 2: Convert to fraction form
    143,956.62/198,660.83 = 79,425.86/x
  3. Step 3: Cross multiply
    143,956.62x = 198,660.83 × 79,425.86
  4. Step 4: Simplify right side
    143,956.62x = 15,778,805,880.63
  5. Step 5: Solve for x
    x = 15,778,805,880.63/143,956.62
  6. Step 6: Final answer
    x = 109,608.06

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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.