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Finding the Fourth Proportional to 66,979.20, 100,468.80 and 33,801.60

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Solution

The fourth proportional to 66,979.20, 100,468.80 and 33,801.60 is: 50,702.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,979.20 : 100,468.80 = 33,801.60 : x
  2. Step 2: Convert to fraction form
    66,979.20/100,468.80 = 33,801.60/x
  3. Step 3: Cross multiply
    66,979.20x = 100,468.80 × 33,801.60
  4. Step 4: Simplify right side
    66,979.20x = 3,396,006,190.08
  5. Step 5: Solve for x
    x = 3,396,006,190.08/66,979.20
  6. Step 6: Final answer
    x = 50,702.40

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1.5x scale

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.