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Finding the Fourth Proportional to 136,616.44, 188,529.78 and 76,187.80

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Solution

The fourth proportional to 136,616.44, 188,529.78 and 76,187.80 is: 105,138.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,616.44 : 188,529.78 = 76,187.80 : x
  2. Step 2: Convert to fraction form
    136,616.44/188,529.78 = 76,187.80/x
  3. Step 3: Cross multiply
    136,616.44x = 188,529.78 × 76,187.80
  4. Step 4: Simplify right side
    136,616.44x = 14,363,669,172.68
  5. Step 5: Solve for x
    x = 14,363,669,172.68/136,616.44
  6. Step 6: Final answer
    x = 105,138.66

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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.