Home / 107,917.60-161,876.40-85,610.20

Finding the Fourth Proportional to 107,917.60, 161,876.40 and 85,610.20

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Solution

The fourth proportional to 107,917.60, 161,876.40 and 85,610.20 is: 128,415.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,917.60 : 161,876.40 = 85,610.20 : x
  2. Step 2: Convert to fraction form
    107,917.60/161,876.40 = 85,610.20/x
  3. Step 3: Cross multiply
    107,917.60x = 161,876.40 × 85,610.20
  4. Step 4: Simplify right side
    107,917.60x = 13,858,270,979.28
  5. Step 5: Solve for x
    x = 13,858,270,979.28/107,917.60
  6. Step 6: Final answer
    x = 128,415.30

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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.