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Finding the Fourth Proportional to 137,169.88, 189,299.82 and 80,580.76

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Solution

The fourth proportional to 137,169.88, 189,299.82 and 80,580.76 is: 111,204.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,169.88 : 189,299.82 = 80,580.76 : x
  2. Step 2: Convert to fraction form
    137,169.88/189,299.82 = 80,580.76/x
  3. Step 3: Cross multiply
    137,169.88x = 189,299.82 × 80,580.76
  4. Step 4: Simplify right side
    137,169.88x = 15,253,923,363.46
  5. Step 5: Solve for x
    x = 15,253,923,363.46/137,169.88
  6. Step 6: Final answer
    x = 111,204.61

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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.