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Finding the Fourth Proportional to 74,789.80, 112,169.61 and 27,388.71

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Solution

The fourth proportional to 74,789.80, 112,169.61 and 27,388.71 is: 41,077.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,789.80 : 112,169.61 = 27,388.71 : x
  2. Step 2: Convert to fraction form
    74,789.80/112,169.61 = 27,388.71/x
  3. Step 3: Cross multiply
    74,789.80x = 112,169.61 × 27,388.71
  4. Step 4: Simplify right side
    74,789.80x = 3,072,180,606.08
  5. Step 5: Solve for x
    x = 3,072,180,606.08/74,789.80
  6. Step 6: Final answer
    x = 41,077.54

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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.