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Finding the Fourth Proportional to 207,445.76, 311,039.77 and 87,440.97

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Solution

The fourth proportional to 207,445.76, 311,039.77 and 87,440.97 is: 131,107.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,445.76 : 311,039.77 = 87,440.97 : x
  2. Step 2: Convert to fraction form
    207,445.76/311,039.77 = 87,440.97/x
  3. Step 3: Cross multiply
    207,445.76x = 311,039.77 × 87,440.97
  4. Step 4: Simplify right side
    207,445.76x = 27,197,618,805.45
  5. Step 5: Solve for x
    x = 27,197,618,805.45/207,445.76
  6. Step 6: Final answer
    x = 131,107.13

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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.