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Finding the Fourth Proportional to 107,619.20, 161,409.60 and 68,105.60

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Solution

The fourth proportional to 107,619.20, 161,409.60 and 68,105.60 is: 102,146.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,619.20 : 161,409.60 = 68,105.60 : x
  2. Step 2: Convert to fraction form
    107,619.20/161,409.60 = 68,105.60/x
  3. Step 3: Cross multiply
    107,619.20x = 161,409.60 × 68,105.60
  4. Step 4: Simplify right side
    107,619.20x = 10,992,897,653.76
  5. Step 5: Solve for x
    x = 10,992,897,653.76/107,619.20
  6. Step 6: Final answer
    x = 102,146.25

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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.