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Finding the Fourth Proportional to 128,512.60, 192,672.90 and 66,227.80

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Solution

The fourth proportional to 128,512.60, 192,672.90 and 66,227.80 is: 99,292.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,512.60 : 192,672.90 = 66,227.80 : x
  2. Step 2: Convert to fraction form
    128,512.60/192,672.90 = 66,227.80/x
  3. Step 3: Cross multiply
    128,512.60x = 192,672.90 × 66,227.80
  4. Step 4: Simplify right side
    128,512.60x = 12,760,302,286.62
  5. Step 5: Solve for x
    x = 12,760,302,286.62/128,512.60
  6. Step 6: Final answer
    x = 99,292.23

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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.