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Finding the Fourth Proportional to 171,390.97, 257,110.39 and 71,528.29

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Solution

The fourth proportional to 171,390.97, 257,110.39 and 71,528.29 is: 107,302.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,390.97 : 257,110.39 = 71,528.29 : x
  2. Step 2: Convert to fraction form
    171,390.97/257,110.39 = 71,528.29/x
  3. Step 3: Cross multiply
    171,390.97x = 257,110.39 × 71,528.29
  4. Step 4: Simplify right side
    171,390.97x = 18,390,667,001.89
  5. Step 5: Solve for x
    x = 18,390,667,001.89/171,390.97
  6. Step 6: Final answer
    x = 107,302.43

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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.