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Finding the Fourth Proportional to 136,687.62, 188,629.20 and 76,256.76

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Solution

The fourth proportional to 136,687.62, 188,629.20 and 76,256.76 is: 105,234.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,687.62 : 188,629.20 = 76,256.76 : x
  2. Step 2: Convert to fraction form
    136,687.62/188,629.20 = 76,256.76/x
  3. Step 3: Cross multiply
    136,687.62x = 188,629.20 × 76,256.76
  4. Step 4: Simplify right side
    136,687.62x = 14,384,251,633.39
  5. Step 5: Solve for x
    x = 14,384,251,633.39/136,687.62
  6. Step 6: Final answer
    x = 105,234.49

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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.