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Finding the Fourth Proportional to 79,715.74, 119,581.71 and 27,128.92

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Solution

The fourth proportional to 79,715.74, 119,581.71 and 27,128.92 is: 40,696.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,715.74 : 119,581.71 = 27,128.92 : x
  2. Step 2: Convert to fraction form
    79,715.74/119,581.71 = 27,128.92/x
  3. Step 3: Cross multiply
    79,715.74x = 119,581.71 × 27,128.92
  4. Step 4: Simplify right side
    79,715.74x = 3,244,122,644.05
  5. Step 5: Solve for x
    x = 3,244,122,644.05/79,715.74
  6. Step 6: Final answer
    x = 40,696.14

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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.