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Finding the Fourth Proportional to 66,829.32, 100,209.42 and 20,076.12

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Solution

The fourth proportional to 66,829.32, 100,209.42 and 20,076.12 is: 30,103.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,829.32 : 100,209.42 = 20,076.12 : x
  2. Step 2: Convert to fraction form
    66,829.32/100,209.42 = 20,076.12/x
  3. Step 3: Cross multiply
    66,829.32x = 100,209.42 × 20,076.12
  4. Step 4: Simplify right side
    66,829.32x = 2,011,816,341.05
  5. Step 5: Solve for x
    x = 2,011,816,341.05/66,829.32
  6. Step 6: Final answer
    x = 30,103.80

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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.