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Finding the Fourth Proportional to 207,555.98, 311,424.44 and 72,716.78

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Solution

The fourth proportional to 207,555.98, 311,424.44 and 72,716.78 is: 109,106.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,555.98 : 311,424.44 = 72,716.78 : x
  2. Step 2: Convert to fraction form
    207,555.98/311,424.44 = 72,716.78/x
  3. Step 3: Cross multiply
    207,555.98x = 311,424.44 × 72,716.78
  4. Step 4: Simplify right side
    207,555.98x = 22,645,782,905.08
  5. Step 5: Solve for x
    x = 22,645,782,905.08/207,555.98
  6. Step 6: Final answer
    x = 109,106.87

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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.