Home / 231,179.15-319,000.32-129,204.81

Finding the Fourth Proportional to 231,179.15, 319,000.32 and 129,204.81

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Solution

The fourth proportional to 231,179.15, 319,000.32 and 129,204.81 is: 178,287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,179.15 : 319,000.32 = 129,204.81 : x
  2. Step 2: Convert to fraction form
    231,179.15/319,000.32 = 129,204.81/x
  3. Step 3: Cross multiply
    231,179.15x = 319,000.32 × 129,204.81
  4. Step 4: Simplify right side
    231,179.15x = 41,216,375,735.54
  5. Step 5: Solve for x
    x = 41,216,375,735.54/231,179.15
  6. Step 6: Final answer
    x = 178,287.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.