Home / 120,984.10-181,512.60-85,992.10

Finding the Fourth Proportional to 120,984.10, 181,512.60 and 85,992.10

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Solution

The fourth proportional to 120,984.10, 181,512.60 and 85,992.10 is: 129,014.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,984.10 : 181,512.60 = 85,992.10 : x
  2. Step 2: Convert to fraction form
    120,984.10/181,512.60 = 85,992.10/x
  3. Step 3: Cross multiply
    120,984.10x = 181,512.60 × 85,992.10
  4. Step 4: Simplify right side
    120,984.10x = 15,608,649,650.46
  5. Step 5: Solve for x
    x = 15,608,649,650.46/120,984.10
  6. Step 6: Final answer
    x = 129,014.06

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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.