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Finding the Fourth Proportional to 138,753.56, 191,479.90 and 75,091.37

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Solution

The fourth proportional to 138,753.56, 191,479.90 and 75,091.37 is: 103,626.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,753.56 : 191,479.90 = 75,091.37 : x
  2. Step 2: Convert to fraction form
    138,753.56/191,479.90 = 75,091.37/x
  3. Step 3: Cross multiply
    138,753.56x = 191,479.90 × 75,091.37
  4. Step 4: Simplify right side
    138,753.56x = 14,378,488,018.46
  5. Step 5: Solve for x
    x = 14,378,488,018.46/138,753.56
  6. Step 6: Final answer
    x = 103,626.08

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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.