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Finding the Fourth Proportional to 57,791.19, 86,693.74 and 20,343.49

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Solution

The fourth proportional to 57,791.19, 86,693.74 and 20,343.49 is: 30,517.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,791.19 : 86,693.74 = 20,343.49 : x
  2. Step 2: Convert to fraction form
    57,791.19/86,693.74 = 20,343.49/x
  3. Step 3: Cross multiply
    57,791.19x = 86,693.74 × 20,343.49
  4. Step 4: Simplify right side
    57,791.19x = 1,763,652,965.16
  5. Step 5: Solve for x
    x = 1,763,652,965.16/57,791.19
  6. Step 6: Final answer
    x = 30,517.68

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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.