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Finding the Fourth Proportional to 79,928.80, 119,907.60 and 33,186.40

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Solution

The fourth proportional to 79,928.80, 119,907.60 and 33,186.40 is: 49,785.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,928.80 : 119,907.60 = 33,186.40 : x
  2. Step 2: Convert to fraction form
    79,928.80/119,907.60 = 33,186.40/x
  3. Step 3: Cross multiply
    79,928.80x = 119,907.60 × 33,186.40
  4. Step 4: Simplify right side
    79,928.80x = 3,979,301,576.64
  5. Step 5: Solve for x
    x = 3,979,301,576.64/79,928.80
  6. Step 6: Final answer
    x = 49,785.58

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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.