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Finding the Fourth Proportional to 136,651.88, 188,579.88 and 76,220.97

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Solution

The fourth proportional to 136,651.88, 188,579.88 and 76,220.97 is: 105,185.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,651.88 : 188,579.88 = 76,220.97 : x
  2. Step 2: Convert to fraction form
    136,651.88/188,579.88 = 76,220.97/x
  3. Step 3: Cross multiply
    136,651.88x = 188,579.88 × 76,220.97
  4. Step 4: Simplify right side
    136,651.88x = 14,373,741,376.08
  5. Step 5: Solve for x
    x = 14,373,741,376.08/136,651.88
  6. Step 6: Final answer
    x = 105,185.10

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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.