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Finding the Fourth Proportional to 133,378.80, 199,799.40 and 83,305.20

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Solution

The fourth proportional to 133,378.80, 199,799.40 and 83,305.20 is: 124,789.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,378.80 : 199,799.40 = 83,305.20 : x
  2. Step 2: Convert to fraction form
    133,378.80/199,799.40 = 83,305.20/x
  3. Step 3: Cross multiply
    133,378.80x = 199,799.40 × 83,305.20
  4. Step 4: Simplify right side
    133,378.80x = 16,644,328,976.88
  5. Step 5: Solve for x
    x = 16,644,328,976.88/133,378.80
  6. Step 6: Final answer
    x = 124,789.91

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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.