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Finding the Fourth Proportional to 132,418.80, 198,628.20 and 79,801.20

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Solution

The fourth proportional to 132,418.80, 198,628.20 and 79,801.20 is: 119,701.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,418.80 : 198,628.20 = 79,801.20 : x
  2. Step 2: Convert to fraction form
    132,418.80/198,628.20 = 79,801.20/x
  3. Step 3: Cross multiply
    132,418.80x = 198,628.20 × 79,801.20
  4. Step 4: Simplify right side
    132,418.80x = 15,850,768,713.84
  5. Step 5: Solve for x
    x = 15,850,768,713.84/132,418.80
  6. Step 6: Final answer
    x = 119,701.80

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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.