Home / 121,326.20-181,989.30-85,896.80

Finding the Fourth Proportional to 121,326.20, 181,989.30 and 85,896.80

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Solution

The fourth proportional to 121,326.20, 181,989.30 and 85,896.80 is: 128,845.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,326.20 : 181,989.30 = 85,896.80 : x
  2. Step 2: Convert to fraction form
    121,326.20/181,989.30 = 85,896.80/x
  3. Step 3: Cross multiply
    121,326.20x = 181,989.30 × 85,896.80
  4. Step 4: Simplify right side
    121,326.20x = 15,632,298,504.24
  5. Step 5: Solve for x
    x = 15,632,298,504.24/121,326.20
  6. Step 6: Final answer
    x = 128,845.20

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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.