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Finding the Fourth Proportional to 132,716.80, 198,806.40 and 82,643.20

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Solution

The fourth proportional to 132,716.80, 198,806.40 and 82,643.20 is: 123,797.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,716.80 : 198,806.40 = 82,643.20 : x
  2. Step 2: Convert to fraction form
    132,716.80/198,806.40 = 82,643.20/x
  3. Step 3: Cross multiply
    132,716.80x = 198,806.40 × 82,643.20
  4. Step 4: Simplify right side
    132,716.80x = 16,429,997,076.48
  5. Step 5: Solve for x
    x = 16,429,997,076.48/132,716.80
  6. Step 6: Final answer
    x = 123,797.42

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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.