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Finding the Fourth Proportional to 138,754.71, 191,481.84 and 75,093.21

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Solution

The fourth proportional to 138,754.71, 191,481.84 and 75,093.21 is: 103,628.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,754.71 : 191,481.84 = 75,093.21 : x
  2. Step 2: Convert to fraction form
    138,754.71/191,481.84 = 75,093.21/x
  3. Step 3: Cross multiply
    138,754.71x = 191,481.84 × 75,093.21
  4. Step 4: Simplify right side
    138,754.71x = 14,378,986,022.31
  5. Step 5: Solve for x
    x = 14,378,986,022.31/138,754.71
  6. Step 6: Final answer
    x = 103,628.81

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1.5x scale

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.