Home / 51,318.40-76,961.60-20,163.20

Finding the Fourth Proportional to 51,318.40, 76,961.60 and 20,163.20

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Solution

The fourth proportional to 51,318.40, 76,961.60 and 20,163.20 is: 30,238.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,318.40 : 76,961.60 = 20,163.20 : x
  2. Step 2: Convert to fraction form
    51,318.40/76,961.60 = 20,163.20/x
  3. Step 3: Cross multiply
    51,318.40x = 76,961.60 × 20,163.20
  4. Step 4: Simplify right side
    51,318.40x = 1,551,792,133.12
  5. Step 5: Solve for x
    x = 1,551,792,133.12/51,318.40
  6. Step 6: Final answer
    x = 30,238.51

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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.