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Finding the Fourth Proportional to 70,201.31, 105,286.48 and 20,270.56

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Solution

The fourth proportional to 70,201.31, 105,286.48 and 20,270.56 is: 30,401.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,201.31 : 105,286.48 = 20,270.56 : x
  2. Step 2: Convert to fraction form
    70,201.31/105,286.48 = 20,270.56/x
  3. Step 3: Cross multiply
    70,201.31x = 105,286.48 × 20,270.56
  4. Step 4: Simplify right side
    70,201.31x = 2,134,215,910.03
  5. Step 5: Solve for x
    x = 2,134,215,910.03/70,201.31
  6. Step 6: Final answer
    x = 30,401.37

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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.