Home / 107,917.10-161,875.65-85,609.70

Finding the Fourth Proportional to 107,917.10, 161,875.65 and 85,609.70

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Solution

The fourth proportional to 107,917.10, 161,875.65 and 85,609.70 is: 128,414.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,917.10 : 161,875.65 = 85,609.70 : x
  2. Step 2: Convert to fraction form
    107,917.10/161,875.65 = 85,609.70/x
  3. Step 3: Cross multiply
    107,917.10x = 161,875.65 × 85,609.70
  4. Step 4: Simplify right side
    107,917.10x = 13,858,125,833.81
  5. Step 5: Solve for x
    x = 13,858,125,833.81/107,917.10
  6. Step 6: Final answer
    x = 128,414.55

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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.