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Finding the Fourth Proportional to 138,494.44, 191,079.84 and 84,723.40

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Solution

The fourth proportional to 138,494.44, 191,079.84 and 84,723.40 is: 116,892.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,494.44 : 191,079.84 = 84,723.40 : x
  2. Step 2: Convert to fraction form
    138,494.44/191,079.84 = 84,723.40/x
  3. Step 3: Cross multiply
    138,494.44x = 191,079.84 × 84,723.40
  4. Step 4: Simplify right side
    138,494.44x = 16,188,933,716.26
  5. Step 5: Solve for x
    x = 16,188,933,716.26/138,494.44
  6. Step 6: Final answer
    x = 116,892.30

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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.