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Finding the Fourth Proportional to 79,943.20, 119,785.20 and 68,279.20

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Solution

The fourth proportional to 79,943.20, 119,785.20 and 68,279.20 is: 102,308.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,943.20 : 119,785.20 = 68,279.20 : x
  2. Step 2: Convert to fraction form
    79,943.20/119,785.20 = 68,279.20/x
  3. Step 3: Cross multiply
    79,943.20x = 119,785.20 × 68,279.20
  4. Step 4: Simplify right side
    79,943.20x = 8,178,837,627.84
  5. Step 5: Solve for x
    x = 8,178,837,627.84/79,943.20
  6. Step 6: Final answer
    x = 102,308.11

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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.