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Finding the Fourth Proportional to 135,005.56, 186,299.96 and 80,619.11

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Solution

The fourth proportional to 135,005.56, 186,299.96 and 80,619.11 is: 111,249.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,005.56 : 186,299.96 = 80,619.11 : x
  2. Step 2: Convert to fraction form
    135,005.56/186,299.96 = 80,619.11/x
  3. Step 3: Cross multiply
    135,005.56x = 186,299.96 × 80,619.11
  4. Step 4: Simplify right side
    135,005.56x = 15,019,336,968.24
  5. Step 5: Solve for x
    x = 15,019,336,968.24/135,005.56
  6. Step 6: Final answer
    x = 111,249.77

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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.