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Finding the Fourth Proportional to 79,785.52, 119,765.78 and 33,071.20

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Solution

The fourth proportional to 79,785.52, 119,765.78 and 33,071.20 is: 49,643.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,785.52 : 119,765.78 = 33,071.20 : x
  2. Step 2: Convert to fraction form
    79,785.52/119,765.78 = 33,071.20/x
  3. Step 3: Cross multiply
    79,785.52x = 119,765.78 × 33,071.20
  4. Step 4: Simplify right side
    79,785.52x = 3,960,798,063.54
  5. Step 5: Solve for x
    x = 3,960,798,063.54/79,785.52
  6. Step 6: Final answer
    x = 49,643.07

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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.