Home / 136,488.15-188,354.07-79,138.73

Finding the Fourth Proportional to 136,488.15, 188,354.07 and 79,138.73

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Solution

The fourth proportional to 136,488.15, 188,354.07 and 79,138.73 is: 109,211.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,488.15 : 188,354.07 = 79,138.73 : x
  2. Step 2: Convert to fraction form
    136,488.15/188,354.07 = 79,138.73/x
  3. Step 3: Cross multiply
    136,488.15x = 188,354.07 × 79,138.73
  4. Step 4: Simplify right side
    136,488.15x = 14,906,100,948.36
  5. Step 5: Solve for x
    x = 14,906,100,948.36/136,488.15
  6. Step 6: Final answer
    x = 109,211.69

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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.