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Finding the Fourth Proportional to 55,791.70, 83,687.55 and 18,855.70

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Solution

The fourth proportional to 55,791.70, 83,687.55 and 18,855.70 is: 28,283.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,791.70 : 83,687.55 = 18,855.70 : x
  2. Step 2: Convert to fraction form
    55,791.70/83,687.55 = 18,855.70/x
  3. Step 3: Cross multiply
    55,791.70x = 83,687.55 × 18,855.70
  4. Step 4: Simplify right side
    55,791.70x = 1,577,987,336.54
  5. Step 5: Solve for x
    x = 1,577,987,336.54/55,791.70
  6. Step 6: Final answer
    x = 28,283.55

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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.