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Finding the Fourth Proportional to 136,775.69, 188,781.95 and 80,205.29

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Solution

The fourth proportional to 136,775.69, 188,781.95 and 80,205.29 is: 110,701.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,775.69 : 188,781.95 = 80,205.29 : x
  2. Step 2: Convert to fraction form
    136,775.69/188,781.95 = 80,205.29/x
  3. Step 3: Cross multiply
    136,775.69x = 188,781.95 × 80,205.29
  4. Step 4: Simplify right side
    136,775.69x = 15,141,311,046.52
  5. Step 5: Solve for x
    x = 15,141,311,046.52/136,775.69
  6. Step 6: Final answer
    x = 110,701.77

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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.