Home / 120,826.38-181,272.24-85,987.20

Finding the Fourth Proportional to 120,826.38, 181,272.24 and 85,987.20

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Solution

The fourth proportional to 120,826.38, 181,272.24 and 85,987.20 is: 129,004.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,826.38 : 181,272.24 = 85,987.20 : x
  2. Step 2: Convert to fraction form
    120,826.38/181,272.24 = 85,987.20/x
  3. Step 3: Cross multiply
    120,826.38x = 181,272.24 × 85,987.20
  4. Step 4: Simplify right side
    120,826.38x = 15,587,092,355.33
  5. Step 5: Solve for x
    x = 15,587,092,355.33/120,826.38
  6. Step 6: Final answer
    x = 129,004.05

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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.