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Finding the Fourth Proportional to 104,100.94, 155,914.92 and 81,470.62

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Solution

The fourth proportional to 104,100.94, 155,914.92 and 81,470.62 is: 122,020.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,100.94 : 155,914.92 = 81,470.62 : x
  2. Step 2: Convert to fraction form
    104,100.94/155,914.92 = 81,470.62/x
  3. Step 3: Cross multiply
    104,100.94x = 155,914.92 × 81,470.62
  4. Step 4: Simplify right side
    104,100.94x = 12,702,485,199.65
  5. Step 5: Solve for x
    x = 12,702,485,199.65/104,100.94
  6. Step 6: Final answer
    x = 122,020.85

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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.