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Finding the Fourth Proportional to 43,757.28, 65,581.20 and 18,767.88

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Solution

The fourth proportional to 43,757.28, 65,581.20 and 18,767.88 is: 28,128.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,757.28 : 65,581.20 = 18,767.88 : x
  2. Step 2: Convert to fraction form
    43,757.28/65,581.20 = 18,767.88/x
  3. Step 3: Cross multiply
    43,757.28x = 65,581.20 × 18,767.88
  4. Step 4: Simplify right side
    43,757.28x = 1,230,820,091.86
  5. Step 5: Solve for x
    x = 1,230,820,091.86/43,757.28
  6. Step 6: Final answer
    x = 28,128.35

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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.