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Finding the Fourth Proportional to 138,637.44, 191,231.62 and 90,893.88

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Solution

The fourth proportional to 138,637.44, 191,231.62 and 90,893.88 is: 125,375.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,637.44 : 191,231.62 = 90,893.88 : x
  2. Step 2: Convert to fraction form
    138,637.44/191,231.62 = 90,893.88/x
  3. Step 3: Cross multiply
    138,637.44x = 191,231.62 × 90,893.88
  4. Step 4: Simplify right side
    138,637.44x = 17,381,783,693.25
  5. Step 5: Solve for x
    x = 17,381,783,693.25/138,637.44
  6. Step 6: Final answer
    x = 125,375.83

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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.