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Finding the Fourth Proportional to 135,007.56, 186,302.72 and 80,621.12

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Solution

The fourth proportional to 135,007.56, 186,302.72 and 80,621.12 is: 111,252.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,007.56 : 186,302.72 = 80,621.12 : x
  2. Step 2: Convert to fraction form
    135,007.56/186,302.72 = 80,621.12/x
  3. Step 3: Cross multiply
    135,007.56x = 186,302.72 × 80,621.12
  4. Step 4: Simplify right side
    135,007.56x = 15,019,932,610.83
  5. Step 5: Solve for x
    x = 15,019,932,610.83/135,007.56
  6. Step 6: Final answer
    x = 111,252.53

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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.