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Finding the Fourth Proportional to 83,906.20, 125,729.70 and 72,760.60

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Solution

The fourth proportional to 83,906.20, 125,729.70 and 72,760.60 is: 109,028.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,906.20 : 125,729.70 = 72,760.60 : x
  2. Step 2: Convert to fraction form
    83,906.20/125,729.70 = 72,760.60/x
  3. Step 3: Cross multiply
    83,906.20x = 125,729.70 × 72,760.60
  4. Step 4: Simplify right side
    83,906.20x = 9,148,168,409.82
  5. Step 5: Solve for x
    x = 9,148,168,409.82/83,906.20
  6. Step 6: Final answer
    x = 109,028.52

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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.