Home / 107,635.20-161,433.60-68,121.60

Finding the Fourth Proportional to 107,635.20, 161,433.60 and 68,121.60

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Solution

The fourth proportional to 107,635.20, 161,433.60 and 68,121.60 is: 102,170.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,635.20 : 161,433.60 = 68,121.60 : x
  2. Step 2: Convert to fraction form
    107,635.20/161,433.60 = 68,121.60/x
  3. Step 3: Cross multiply
    107,635.20x = 161,433.60 × 68,121.60
  4. Step 4: Simplify right side
    107,635.20x = 10,997,115,125.76
  5. Step 5: Solve for x
    x = 10,997,115,125.76/107,635.20
  6. Step 6: Final answer
    x = 102,170.25

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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.