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Finding the Fourth Proportional to 136,684.86, 188,620.83 and 80,133.90

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Solution

The fourth proportional to 136,684.86, 188,620.83 and 80,133.90 is: 110,582.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,684.86 : 188,620.83 = 80,133.90 : x
  2. Step 2: Convert to fraction form
    136,684.86/188,620.83 = 80,133.90/x
  3. Step 3: Cross multiply
    136,684.86x = 188,620.83 × 80,133.90
  4. Step 4: Simplify right side
    136,684.86x = 15,114,922,729.14
  5. Step 5: Solve for x
    x = 15,114,922,729.14/136,684.86
  6. Step 6: Final answer
    x = 110,582.27

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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.