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Finding the Fourth Proportional to 104,843.80, 156,896.34 and 85,896.28

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Solution

The fourth proportional to 104,843.80, 156,896.34 and 85,896.28 is: 128,541.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,843.80 : 156,896.34 = 85,896.28 : x
  2. Step 2: Convert to fraction form
    104,843.80/156,896.34 = 85,896.28/x
  3. Step 3: Cross multiply
    104,843.80x = 156,896.34 × 85,896.28
  4. Step 4: Simplify right side
    104,843.80x = 13,476,811,951.62
  5. Step 5: Solve for x
    x = 13,476,811,951.62/104,843.80
  6. Step 6: Final answer
    x = 128,541.81

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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.