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Finding the Fourth Proportional to 207,376.20, 311,103.99 and 81,011.34

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Solution

The fourth proportional to 207,376.20, 311,103.99 and 81,011.34 is: 121,532.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,376.20 : 311,103.99 = 81,011.34 : x
  2. Step 2: Convert to fraction form
    207,376.20/311,103.99 = 81,011.34/x
  3. Step 3: Cross multiply
    207,376.20x = 311,103.99 × 81,011.34
  4. Step 4: Simplify right side
    207,376.20x = 25,202,951,109.25
  5. Step 5: Solve for x
    x = 25,202,951,109.25/207,376.20
  6. Step 6: Final answer
    x = 121,532.51

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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.