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Finding the Fourth Proportional to 207,596.70, 311,347.26 and 81,239.94

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Solution

The fourth proportional to 207,596.70, 311,347.26 and 81,239.94 is: 121,841.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,596.70 : 311,347.26 = 81,239.94 : x
  2. Step 2: Convert to fraction form
    207,596.70/311,347.26 = 81,239.94/x
  3. Step 3: Cross multiply
    207,596.70x = 311,347.26 × 81,239.94
  4. Step 4: Simplify right side
    207,596.70x = 25,293,832,721.56
  5. Step 5: Solve for x
    x = 25,293,832,721.56/207,596.70
  6. Step 6: Final answer
    x = 121,841.21

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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.