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Finding the Fourth Proportional to 138,058.37, 206,956.33 and 87,997.94

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Solution

The fourth proportional to 138,058.37, 206,956.33 and 87,997.94 is: 131,913.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,058.37 : 206,956.33 = 87,997.94 : x
  2. Step 2: Convert to fraction form
    138,058.37/206,956.33 = 87,997.94/x
  3. Step 3: Cross multiply
    138,058.37x = 206,956.33 × 87,997.94
  4. Step 4: Simplify right side
    138,058.37x = 18,211,729,455.18
  5. Step 5: Solve for x
    x = 18,211,729,455.18/138,058.37
  6. Step 6: Final answer
    x = 131,913.26

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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.