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Finding the Fourth Proportional to 143,957.58, 198,672.72 and 79,439.61

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Solution

The fourth proportional to 143,957.58, 198,672.72 and 79,439.61 is: 109,632.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,957.58 : 198,672.72 = 79,439.61 : x
  2. Step 2: Convert to fraction form
    143,957.58/198,672.72 = 79,439.61/x
  3. Step 3: Cross multiply
    143,957.58x = 198,672.72 × 79,439.61
  4. Step 4: Simplify right side
    143,957.58x = 15,782,483,841.56
  5. Step 5: Solve for x
    x = 15,782,483,841.56/143,957.58
  6. Step 6: Final answer
    x = 109,632.88

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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.