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Finding the Fourth Proportional to 136,409.46, 188,245.41 and 79,059.90

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Solution

The fourth proportional to 136,409.46, 188,245.41 and 79,059.90 is: 109,102.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,409.46 : 188,245.41 = 79,059.90 : x
  2. Step 2: Convert to fraction form
    136,409.46/188,245.41 = 79,059.90/x
  3. Step 3: Cross multiply
    136,409.46x = 188,245.41 × 79,059.90
  4. Step 4: Simplify right side
    136,409.46x = 14,882,663,290.06
  5. Step 5: Solve for x
    x = 14,882,663,290.06/136,409.46
  6. Step 6: Final answer
    x = 109,102.87

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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.