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Finding the Fourth Proportional to 66,843.28, 100,284.60 and 20,103.28

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Solution

The fourth proportional to 66,843.28, 100,284.60 and 20,103.28 is: 30,160.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,843.28 : 100,284.60 = 20,103.28 : x
  2. Step 2: Convert to fraction form
    66,843.28/100,284.60 = 20,103.28/x
  3. Step 3: Cross multiply
    66,843.28x = 100,284.60 × 20,103.28
  4. Step 4: Simplify right side
    66,843.28x = 2,016,049,393.49
  5. Step 5: Solve for x
    x = 2,016,049,393.49/66,843.28
  6. Step 6: Final answer
    x = 30,160.84

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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.