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Finding the Fourth Proportional to 84,109.76, 126,163.20 and 39,757.76

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Solution

The fourth proportional to 84,109.76, 126,163.20 and 39,757.76 is: 59,635.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,109.76 : 126,163.20 = 39,757.76 : x
  2. Step 2: Convert to fraction form
    84,109.76/126,163.20 = 39,757.76/x
  3. Step 3: Cross multiply
    84,109.76x = 126,163.20 × 39,757.76
  4. Step 4: Simplify right side
    84,109.76x = 5,015,966,226.43
  5. Step 5: Solve for x
    x = 5,015,966,226.43/84,109.76
  6. Step 6: Final answer
    x = 59,635.96

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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.