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Finding the Fourth Proportional to 207,618.82, 311,428.44 and 57,859.54

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Solution

The fourth proportional to 207,618.82, 311,428.44 and 57,859.54 is: 86,789.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,618.82 : 311,428.44 = 57,859.54 : x
  2. Step 2: Convert to fraction form
    207,618.82/311,428.44 = 57,859.54/x
  3. Step 3: Cross multiply
    207,618.82x = 311,428.44 × 57,859.54
  4. Step 4: Simplify right side
    207,618.82x = 18,019,106,281.32
  5. Step 5: Solve for x
    x = 18,019,106,281.32/207,618.82
  6. Step 6: Final answer
    x = 86,789.37

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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.