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Finding the Fourth Proportional to 210,171.96, 315,336.81 and 125,992.10

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Solution

The fourth proportional to 210,171.96, 315,336.81 and 125,992.10 is: 189,035.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,171.96 : 315,336.81 = 125,992.10 : x
  2. Step 2: Convert to fraction form
    210,171.96/315,336.81 = 125,992.10/x
  3. Step 3: Cross multiply
    210,171.96x = 315,336.81 × 125,992.10
  4. Step 4: Simplify right side
    210,171.96x = 39,729,947,687.54
  5. Step 5: Solve for x
    x = 39,729,947,687.54/210,171.96
  6. Step 6: Final answer
    x = 189,035.43

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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.