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Finding the Fourth Proportional to 168,489.68, 252,609.78 and 79,639.43

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Solution

The fourth proportional to 168,489.68, 252,609.78 and 79,639.43 is: 119,400.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,489.68 : 252,609.78 = 79,639.43 : x
  2. Step 2: Convert to fraction form
    168,489.68/252,609.78 = 79,639.43/x
  3. Step 3: Cross multiply
    168,489.68x = 252,609.78 × 79,639.43
  4. Step 4: Simplify right side
    168,489.68x = 20,117,698,891.63
  5. Step 5: Solve for x
    x = 20,117,698,891.63/168,489.68
  6. Step 6: Final answer
    x = 119,400.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.