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Finding the Fourth Proportional to 207,405.52, 311,157.48 and 67,163.92

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Solution

The fourth proportional to 207,405.52, 311,157.48 and 67,163.92 is: 100,761.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,405.52 : 311,157.48 = 67,163.92 : x
  2. Step 2: Convert to fraction form
    207,405.52/311,157.48 = 67,163.92/x
  3. Step 3: Cross multiply
    207,405.52x = 311,157.48 × 67,163.92
  4. Step 4: Simplify right side
    207,405.52x = 20,898,556,094.12
  5. Step 5: Solve for x
    x = 20,898,556,094.12/207,405.52
  6. Step 6: Final answer
    x = 100,761.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.