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Finding the Fourth Proportional to 80,745.54, 111,555.26 and 61,692

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Solution

The fourth proportional to 80,745.54, 111,555.26 and 61,692 is: 85,231.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,745.54 : 111,555.26 = 61,692 : x
  2. Step 2: Convert to fraction form
    80,745.54/111,555.26 = 61,692/x
  3. Step 3: Cross multiply
    80,745.54x = 111,555.26 × 61,692
  4. Step 4: Simplify right side
    80,745.54x = 6,882,066,791.46
  5. Step 5: Solve for x
    x = 6,882,066,791.46/80,745.54
  6. Step 6: Final answer
    x = 85,231.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.