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Finding the Fourth Proportional to 179,731, 248,028.78 and 100,243

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Solution

The fourth proportional to 179,731, 248,028.78 and 100,243 is: 138,335.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,731 : 248,028.78 = 100,243 : x
  2. Step 2: Convert to fraction form
    179,731/248,028.78 = 100,243/x
  3. Step 3: Cross multiply
    179,731x = 248,028.78 × 100,243
  4. Step 4: Simplify right side
    179,731x = 24,863,148,993.54
  5. Step 5: Solve for x
    x = 24,863,148,993.54/179,731
  6. Step 6: Final answer
    x = 138,335.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.