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Finding the Fourth Proportional to 207,597.70, 311,348.76 and 81,240.94

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Solution

The fourth proportional to 207,597.70, 311,348.76 and 81,240.94 is: 121,842.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,597.70 : 311,348.76 = 81,240.94 : x
  2. Step 2: Convert to fraction form
    207,597.70/311,348.76 = 81,240.94/x
  3. Step 3: Cross multiply
    207,597.70x = 311,348.76 × 81,240.94
  4. Step 4: Simplify right side
    207,597.70x = 25,294,265,930.23
  5. Step 5: Solve for x
    x = 25,294,265,930.23/207,597.70
  6. Step 6: Final answer
    x = 121,842.71

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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.