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Finding the Fourth Proportional to 73,016.54, 109,531.48 and 20,425.87

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Solution

The fourth proportional to 73,016.54, 109,531.48 and 20,425.87 is: 30,640.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,016.54 : 109,531.48 = 20,425.87 : x
  2. Step 2: Convert to fraction form
    73,016.54/109,531.48 = 20,425.87/x
  3. Step 3: Cross multiply
    73,016.54x = 109,531.48 × 20,425.87
  4. Step 4: Simplify right side
    73,016.54x = 2,237,275,223.73
  5. Step 5: Solve for x
    x = 2,237,275,223.73/73,016.54
  6. Step 6: Final answer
    x = 30,640.67

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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.