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Finding the Fourth Proportional to 248,340, 342,709.20 and 135,163.56

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Solution

The fourth proportional to 248,340, 342,709.20 and 135,163.56 is: 186,525.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,340 : 342,709.20 = 135,163.56 : x
  2. Step 2: Convert to fraction form
    248,340/342,709.20 = 135,163.56/x
  3. Step 3: Cross multiply
    248,340x = 342,709.20 × 135,163.56
  4. Step 4: Simplify right side
    248,340x = 46,321,795,516.75
  5. Step 5: Solve for x
    x = 46,321,795,516.75/248,340
  6. Step 6: Final answer
    x = 186,525.71

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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.