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Finding the Fourth Proportional to 43,799.69, 65,704.80 and 20,420.66

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Solution

The fourth proportional to 43,799.69, 65,704.80 and 20,420.66 is: 30,633.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,799.69 : 65,704.80 = 20,420.66 : x
  2. Step 2: Convert to fraction form
    43,799.69/65,704.80 = 20,420.66/x
  3. Step 3: Cross multiply
    43,799.69x = 65,704.80 × 20,420.66
  4. Step 4: Simplify right side
    43,799.69x = 1,341,735,052.64
  5. Step 5: Solve for x
    x = 1,341,735,052.64/43,799.69
  6. Step 6: Final answer
    x = 30,633.44

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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.