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Finding the Fourth Proportional to 136,663.91, 188,596.39 and 79,314.43

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Solution

The fourth proportional to 136,663.91, 188,596.39 and 79,314.43 is: 109,454.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,663.91 : 188,596.39 = 79,314.43 : x
  2. Step 2: Convert to fraction form
    136,663.91/188,596.39 = 79,314.43/x
  3. Step 3: Cross multiply
    136,663.91x = 188,596.39 × 79,314.43
  4. Step 4: Simplify right side
    136,663.91x = 14,958,414,229.93
  5. Step 5: Solve for x
    x = 14,958,414,229.93/136,663.91
  6. Step 6: Final answer
    x = 109,454.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.