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Finding the Fourth Proportional to 85,311.37, 127,704.57 and 55,665.37

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Solution

The fourth proportional to 85,311.37, 127,704.57 and 55,665.37 is: 83,326.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,311.37 : 127,704.57 = 55,665.37 : x
  2. Step 2: Convert to fraction form
    85,311.37/127,704.57 = 55,665.37/x
  3. Step 3: Cross multiply
    85,311.37x = 127,704.57 × 55,665.37
  4. Step 4: Simplify right side
    85,311.37x = 7,108,722,139.74
  5. Step 5: Solve for x
    x = 7,108,722,139.74/85,311.37
  6. Step 6: Final answer
    x = 83,326.78

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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.