Home / 138,658.12-207,987.20-45,163.88

Finding the Fourth Proportional to 138,658.12, 207,987.20 and 45,163.88

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Solution

The fourth proportional to 138,658.12, 207,987.20 and 45,163.88 is: 67,745.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,658.12 : 207,987.20 = 45,163.88 : x
  2. Step 2: Convert to fraction form
    138,658.12/207,987.20 = 45,163.88/x
  3. Step 3: Cross multiply
    138,658.12x = 207,987.20 × 45,163.88
  4. Step 4: Simplify right side
    138,658.12x = 9,393,508,942.34
  5. Step 5: Solve for x
    x = 9,393,508,942.34/138,658.12
  6. Step 6: Final answer
    x = 67,745.83

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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.