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Finding the Fourth Proportional to 138,753.44, 191,480.08 and 75,091.92

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Solution

The fourth proportional to 138,753.44, 191,480.08 and 75,091.92 is: 103,627.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,753.44 : 191,480.08 = 75,091.92 : x
  2. Step 2: Convert to fraction form
    138,753.44/191,480.08 = 75,091.92/x
  3. Step 3: Cross multiply
    138,753.44x = 191,480.08 × 75,091.92
  4. Step 4: Simplify right side
    138,753.44x = 14,378,606,848.95
  5. Step 5: Solve for x
    x = 14,378,606,848.95/138,753.44
  6. Step 6: Final answer
    x = 103,627.03

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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.