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Finding the Fourth Proportional to 100,609.43, 150,772.67 and 79,456.58

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Solution

The fourth proportional to 100,609.43, 150,772.67 and 79,456.58 is: 119,073.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,609.43 : 150,772.67 = 79,456.58 : x
  2. Step 2: Convert to fraction form
    100,609.43/150,772.67 = 79,456.58/x
  3. Step 3: Cross multiply
    100,609.43x = 150,772.67 × 79,456.58
  4. Step 4: Simplify right side
    100,609.43x = 11,979,879,564.52
  5. Step 5: Solve for x
    x = 11,979,879,564.52/100,609.43
  6. Step 6: Final answer
    x = 119,073.13

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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.