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Finding the Fourth Proportional to 136,797.36, 188,789.88 and 76,379.88

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Solution

The fourth proportional to 136,797.36, 188,789.88 and 76,379.88 is: 105,409.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,797.36 : 188,789.88 = 76,379.88 : x
  2. Step 2: Convert to fraction form
    136,797.36/188,789.88 = 76,379.88/x
  3. Step 3: Cross multiply
    136,797.36x = 188,789.88 × 76,379.88
  4. Step 4: Simplify right side
    136,797.36x = 14,419,748,379.61
  5. Step 5: Solve for x
    x = 14,419,748,379.61/136,797.36
  6. Step 6: Final answer
    x = 105,409.55

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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.