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Finding the Fourth Proportional to 171,992.51, 257,871.05 and 87,589.35

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Solution

The fourth proportional to 171,992.51, 257,871.05 and 87,589.35 is: 131,324.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,992.51 : 257,871.05 = 87,589.35 : x
  2. Step 2: Convert to fraction form
    171,992.51/257,871.05 = 87,589.35/x
  3. Step 3: Cross multiply
    171,992.51x = 257,871.05 × 87,589.35
  4. Step 4: Simplify right side
    171,992.51x = 22,586,757,605.42
  5. Step 5: Solve for x
    x = 22,586,757,605.42/171,992.51
  6. Step 6: Final answer
    x = 131,324.07

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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.