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Finding the Fourth Proportional to 136,650.88, 188,578.50 and 76,219.97

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Solution

The fourth proportional to 136,650.88, 188,578.50 and 76,219.97 is: 105,183.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,650.88 : 188,578.50 = 76,219.97 : x
  2. Step 2: Convert to fraction form
    136,650.88/188,578.50 = 76,219.97/x
  3. Step 3: Cross multiply
    136,650.88x = 188,578.50 × 76,219.97
  4. Step 4: Simplify right side
    136,650.88x = 14,373,447,662.75
  5. Step 5: Solve for x
    x = 14,373,447,662.75/136,650.88
  6. Step 6: Final answer
    x = 105,183.72

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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.