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Finding the Fourth Proportional to 136,991.97, 189,169.16 and 86,092.92

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Solution

The fourth proportional to 136,991.97, 189,169.16 and 86,092.92 is: 118,883.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,991.97 : 189,169.16 = 86,092.92 : x
  2. Step 2: Convert to fraction form
    136,991.97/189,169.16 = 86,092.92/x
  3. Step 3: Cross multiply
    136,991.97x = 189,169.16 × 86,092.92
  4. Step 4: Simplify right side
    136,991.97x = 16,286,124,927.88
  5. Step 5: Solve for x
    x = 16,286,124,927.88/136,991.97
  6. Step 6: Final answer
    x = 118,883.79

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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.