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Finding the Fourth Proportional to 79,976.20, 119,893 and 40,513

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Solution

The fourth proportional to 79,976.20, 119,893 and 40,513 is: 60,733.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,976.20 : 119,893 = 40,513 : x
  2. Step 2: Convert to fraction form
    79,976.20/119,893 = 40,513/x
  3. Step 3: Cross multiply
    79,976.20x = 119,893 × 40,513
  4. Step 4: Simplify right side
    79,976.20x = 4,857,225,109
  5. Step 5: Solve for x
    x = 4,857,225,109/79,976.20
  6. Step 6: Final answer
    x = 60,733.38

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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.