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Finding the Fourth Proportional to 138,571, 191,227.90 and 74,908.92

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Solution

The fourth proportional to 138,571, 191,227.90 and 74,908.92 is: 103,374.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,571 : 191,227.90 = 74,908.92 : x
  2. Step 2: Convert to fraction form
    138,571/191,227.90 = 74,908.92/x
  3. Step 3: Cross multiply
    138,571x = 191,227.90 × 74,908.92
  4. Step 4: Simplify right side
    138,571x = 14,324,675,462.87
  5. Step 5: Solve for x
    x = 14,324,675,462.87/138,571
  6. Step 6: Final answer
    x = 103,374.27

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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.