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Finding the Fourth Proportional to 55,851.87, 83,781.87 and 20,791.50

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Solution

The fourth proportional to 55,851.87, 83,781.87 and 20,791.50 is: 31,188.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,851.87 : 83,781.87 = 20,791.50 : x
  2. Step 2: Convert to fraction form
    55,851.87/83,781.87 = 20,791.50/x
  3. Step 3: Cross multiply
    55,851.87x = 83,781.87 × 20,791.50
  4. Step 4: Simplify right side
    55,851.87x = 1,741,950,750.11
  5. Step 5: Solve for x
    x = 1,741,950,750.11/55,851.87
  6. Step 6: Final answer
    x = 31,188.76

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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.