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Finding the Fourth Proportional to 136,542.34, 188,400.63 and 79,942.78

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Solution

The fourth proportional to 136,542.34, 188,400.63 and 79,942.78 is: 110,304.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,542.34 : 188,400.63 = 79,942.78 : x
  2. Step 2: Convert to fraction form
    136,542.34/188,400.63 = 79,942.78/x
  3. Step 3: Cross multiply
    136,542.34x = 188,400.63 × 79,942.78
  4. Step 4: Simplify right side
    136,542.34x = 15,061,270,115.95
  5. Step 5: Solve for x
    x = 15,061,270,115.95/136,542.34
  6. Step 6: Final answer
    x = 110,304.76

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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.