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Finding the Fourth Proportional to 43,755.20, 65,632.80 and 12,165.20

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Solution

The fourth proportional to 43,755.20, 65,632.80 and 12,165.20 is: 18,247.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,755.20 : 65,632.80 = 12,165.20 : x
  2. Step 2: Convert to fraction form
    43,755.20/65,632.80 = 12,165.20/x
  3. Step 3: Cross multiply
    43,755.20x = 65,632.80 × 12,165.20
  4. Step 4: Simplify right side
    43,755.20x = 798,436,138.56
  5. Step 5: Solve for x
    x = 798,436,138.56/43,755.20
  6. Step 6: Final answer
    x = 18,247.80

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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.