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Finding the Fourth Proportional to 45,052.80, 67,617.60 and 20,131.20

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Solution

The fourth proportional to 45,052.80, 67,617.60 and 20,131.20 is: 30,213.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,052.80 : 67,617.60 = 20,131.20 : x
  2. Step 2: Convert to fraction form
    45,052.80/67,617.60 = 20,131.20/x
  3. Step 3: Cross multiply
    45,052.80x = 67,617.60 × 20,131.20
  4. Step 4: Simplify right side
    45,052.80x = 1,361,223,429.12
  5. Step 5: Solve for x
    x = 1,361,223,429.12/45,052.80
  6. Step 6: Final answer
    x = 30,213.96

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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.