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Finding the Fourth Proportional to 126,761.92, 189,869.51 and 119,309.28

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Solution

The fourth proportional to 126,761.92, 189,869.51 and 119,309.28 is: 178,706.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,761.92 : 189,869.51 = 119,309.28 : x
  2. Step 2: Convert to fraction form
    126,761.92/189,869.51 = 119,309.28/x
  3. Step 3: Cross multiply
    126,761.92x = 189,869.51 × 119,309.28
  4. Step 4: Simplify right side
    126,761.92x = 22,653,194,532.05
  5. Step 5: Solve for x
    x = 22,653,194,532.05/126,761.92
  6. Step 6: Final answer
    x = 178,706.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.