Home / 107,921.60-161,882.40-85,614.20

Finding the Fourth Proportional to 107,921.60, 161,882.40 and 85,614.20

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Solution

The fourth proportional to 107,921.60, 161,882.40 and 85,614.20 is: 128,421.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,921.60 : 161,882.40 = 85,614.20 : x
  2. Step 2: Convert to fraction form
    107,921.60/161,882.40 = 85,614.20/x
  3. Step 3: Cross multiply
    107,921.60x = 161,882.40 × 85,614.20
  4. Step 4: Simplify right side
    107,921.60x = 13,859,432,170.08
  5. Step 5: Solve for x
    x = 13,859,432,170.08/107,921.60
  6. Step 6: Final answer
    x = 128,421.30

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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.