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Finding the Fourth Proportional to 104,640.80, 156,961.20 and 55,488.80

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Solution

The fourth proportional to 104,640.80, 156,961.20 and 55,488.80 is: 83,233.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,640.80 : 156,961.20 = 55,488.80 : x
  2. Step 2: Convert to fraction form
    104,640.80/156,961.20 = 55,488.80/x
  3. Step 3: Cross multiply
    104,640.80x = 156,961.20 × 55,488.80
  4. Step 4: Simplify right side
    104,640.80x = 8,709,588,634.56
  5. Step 5: Solve for x
    x = 8,709,588,634.56/104,640.80
  6. Step 6: Final answer
    x = 83,233.20

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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.