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Finding the Fourth Proportional to 136,991.79, 189,044.82 and 76,562.64

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Solution

The fourth proportional to 136,991.79, 189,044.82 and 76,562.64 is: 105,654.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,991.79 : 189,044.82 = 76,562.64 : x
  2. Step 2: Convert to fraction form
    136,991.79/189,044.82 = 76,562.64/x
  3. Step 3: Cross multiply
    136,991.79x = 189,044.82 × 76,562.64
  4. Step 4: Simplify right side
    136,991.79x = 14,473,770,497.52
  5. Step 5: Solve for x
    x = 14,473,770,497.52/136,991.79
  6. Step 6: Final answer
    x = 105,654.29

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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.