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Finding the Fourth Proportional to 171,439.27, 257,034.35 and 71,628.01

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Solution

The fourth proportional to 171,439.27, 257,034.35 and 71,628.01 is: 107,389.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,439.27 : 257,034.35 = 71,628.01 : x
  2. Step 2: Convert to fraction form
    171,439.27/257,034.35 = 71,628.01/x
  3. Step 3: Cross multiply
    171,439.27x = 257,034.35 × 71,628.01
  4. Step 4: Simplify right side
    171,439.27x = 18,410,858,789.36
  5. Step 5: Solve for x
    x = 18,410,858,789.36/171,439.27
  6. Step 6: Final answer
    x = 107,389.97

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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.