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Finding the Fourth Proportional to 321,072.81, 481,612.86 and 84,439.41

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Solution

The fourth proportional to 321,072.81, 481,612.86 and 84,439.41 is: 126,660.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,072.81 : 481,612.86 = 84,439.41 : x
  2. Step 2: Convert to fraction form
    321,072.81/481,612.86 = 84,439.41/x
  3. Step 3: Cross multiply
    321,072.81x = 481,612.86 × 84,439.41
  4. Step 4: Simplify right side
    321,072.81x = 40,667,105,746.81
  5. Step 5: Solve for x
    x = 40,667,105,746.81/321,072.81
  6. Step 6: Final answer
    x = 126,660.07

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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.