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Finding the Fourth Proportional to 107,995.20, 161,992.80 and 68,580.60

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Solution

The fourth proportional to 107,995.20, 161,992.80 and 68,580.60 is: 102,870.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,995.20 : 161,992.80 = 68,580.60 : x
  2. Step 2: Convert to fraction form
    107,995.20/161,992.80 = 68,580.60/x
  3. Step 3: Cross multiply
    107,995.20x = 161,992.80 × 68,580.60
  4. Step 4: Simplify right side
    107,995.20x = 11,109,563,419.68
  5. Step 5: Solve for x
    x = 11,109,563,419.68/107,995.20
  6. Step 6: Final answer
    x = 102,870.90

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1.5x scale

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.