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Finding the Fourth Proportional to 90,911.54, 136,375.18 and 27,745.88

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Solution

The fourth proportional to 90,911.54, 136,375.18 and 27,745.88 is: 41,621.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,911.54 : 136,375.18 = 27,745.88 : x
  2. Step 2: Convert to fraction form
    90,911.54/136,375.18 = 27,745.88/x
  3. Step 3: Cross multiply
    90,911.54x = 136,375.18 × 27,745.88
  4. Step 4: Simplify right side
    90,911.54x = 3,783,849,379.26
  5. Step 5: Solve for x
    x = 3,783,849,379.26/90,911.54
  6. Step 6: Final answer
    x = 41,621.22

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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.