Home / 107,998.40-161,997.60-78,276.80

Finding the Fourth Proportional to 107,998.40, 161,997.60 and 78,276.80

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Solution

The fourth proportional to 107,998.40, 161,997.60 and 78,276.80 is: 117,415.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,998.40 : 161,997.60 = 78,276.80 : x
  2. Step 2: Convert to fraction form
    107,998.40/161,997.60 = 78,276.80/x
  3. Step 3: Cross multiply
    107,998.40x = 161,997.60 × 78,276.80
  4. Step 4: Simplify right side
    107,998.40x = 12,680,653,735.68
  5. Step 5: Solve for x
    x = 12,680,653,735.68/107,998.40
  6. Step 6: Final answer
    x = 117,415.20

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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.