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Finding the Fourth Proportional to 45,163.80, 67,745.70 and 31,750.20

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Solution

The fourth proportional to 45,163.80, 67,745.70 and 31,750.20 is: 47,625.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,163.80 : 67,745.70 = 31,750.20 : x
  2. Step 2: Convert to fraction form
    45,163.80/67,745.70 = 31,750.20/x
  3. Step 3: Cross multiply
    45,163.80x = 67,745.70 × 31,750.20
  4. Step 4: Simplify right side
    45,163.80x = 2,150,939,524.14
  5. Step 5: Solve for x
    x = 2,150,939,524.14/45,163.80
  6. Step 6: Final answer
    x = 47,625.30

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1.5x scale

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.