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Finding the Fourth Proportional to 43,899.59, 65,851.01 and 20,519.75

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Solution

The fourth proportional to 43,899.59, 65,851.01 and 20,519.75 is: 30,780.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,899.59 : 65,851.01 = 20,519.75 : x
  2. Step 2: Convert to fraction form
    43,899.59/65,851.01 = 20,519.75/x
  3. Step 3: Cross multiply
    43,899.59x = 65,851.01 × 20,519.75
  4. Step 4: Simplify right side
    43,899.59x = 1,351,246,262.45
  5. Step 5: Solve for x
    x = 1,351,246,262.45/43,899.59
  6. Step 6: Final answer
    x = 30,780.38

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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.