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Finding the Fourth Proportional to 79,995.30, 119,979.79 and 26,687.67

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Solution

The fourth proportional to 79,995.30, 119,979.79 and 26,687.67 is: 40,027.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,995.30 : 119,979.79 = 26,687.67 : x
  2. Step 2: Convert to fraction form
    79,995.30/119,979.79 = 26,687.67/x
  3. Step 3: Cross multiply
    79,995.30x = 119,979.79 × 26,687.67
  4. Step 4: Simplify right side
    79,995.30x = 3,201,981,042.19
  5. Step 5: Solve for x
    x = 3,201,981,042.19/79,995.30
  6. Step 6: Final answer
    x = 40,027.11

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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.