Home / 136,778.40-188,839.49-88,405.61

Finding the Fourth Proportional to 136,778.40, 188,839.49 and 88,405.61

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Solution

The fourth proportional to 136,778.40, 188,839.49 and 88,405.61 is: 122,054.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,778.40 : 188,839.49 = 88,405.61 : x
  2. Step 2: Convert to fraction form
    136,778.40/188,839.49 = 88,405.61/x
  3. Step 3: Cross multiply
    136,778.40x = 188,839.49 × 88,405.61
  4. Step 4: Simplify right side
    136,778.40x = 16,694,468,919.31
  5. Step 5: Solve for x
    x = 16,694,468,919.31/136,778.40
  6. Step 6: Final answer
    x = 122,054.86

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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.