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Finding the Fourth Proportional to 136,488.58, 188,354.99 and 79,161.88

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Solution

The fourth proportional to 136,488.58, 188,354.99 and 79,161.88 is: 109,243.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,488.58 : 188,354.99 = 79,161.88 : x
  2. Step 2: Convert to fraction form
    136,488.58/188,354.99 = 79,161.88/x
  3. Step 3: Cross multiply
    136,488.58x = 188,354.99 × 79,161.88
  4. Step 4: Simplify right side
    136,488.58x = 14,910,535,115.78
  5. Step 5: Solve for x
    x = 14,910,535,115.78/136,488.58
  6. Step 6: Final answer
    x = 109,243.83

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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.