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Finding the Fourth Proportional to 170,620.40, 256,007.40 and 81,839.60

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Solution

The fourth proportional to 170,620.40, 256,007.40 and 81,839.60 is: 122,796.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,620.40 : 256,007.40 = 81,839.60 : x
  2. Step 2: Convert to fraction form
    170,620.40/256,007.40 = 81,839.60/x
  3. Step 3: Cross multiply
    170,620.40x = 256,007.40 × 81,839.60
  4. Step 4: Simplify right side
    170,620.40x = 20,951,543,213.04
  5. Step 5: Solve for x
    x = 20,951,543,213.04/170,620.40
  6. Step 6: Final answer
    x = 122,796.24

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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.