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Finding the Fourth Proportional to 70,908.96, 106,380.43 and 20,308.70

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Solution

The fourth proportional to 70,908.96, 106,380.43 and 20,308.70 is: 30,467.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,908.96 : 106,380.43 = 20,308.70 : x
  2. Step 2: Convert to fraction form
    70,908.96/106,380.43 = 20,308.70/x
  3. Step 3: Cross multiply
    70,908.96x = 106,380.43 × 20,308.70
  4. Step 4: Simplify right side
    70,908.96x = 2,160,448,453.92
  5. Step 5: Solve for x
    x = 2,160,448,453.92/70,908.96
  6. Step 6: Final answer
    x = 30,467.92

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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.