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Finding the Fourth Proportional to 172,855.28, 238,738.91 and 115,394.56

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Solution

The fourth proportional to 172,855.28, 238,738.91 and 115,394.56 is: 159,377.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,855.28 : 238,738.91 = 115,394.56 : x
  2. Step 2: Convert to fraction form
    172,855.28/238,738.91 = 115,394.56/x
  3. Step 3: Cross multiply
    172,855.28x = 238,738.91 × 115,394.56
  4. Step 4: Simplify right side
    172,855.28x = 27,549,171,474.33
  5. Step 5: Solve for x
    x = 27,549,171,474.33/172,855.28
  6. Step 6: Final answer
    x = 159,377.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.