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Finding the Fourth Proportional to 199,331, 275,076.78 and 109,912.76

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Solution

The fourth proportional to 199,331, 275,076.78 and 109,912.76 is: 151,679.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,331 : 275,076.78 = 109,912.76 : x
  2. Step 2: Convert to fraction form
    199,331/275,076.78 = 109,912.76/x
  3. Step 3: Cross multiply
    199,331x = 275,076.78 × 109,912.76
  4. Step 4: Simplify right side
    199,331x = 30,234,448,101.71
  5. Step 5: Solve for x
    x = 30,234,448,101.71/199,331
  6. Step 6: Final answer
    x = 151,679.61

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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.