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Finding the Fourth Proportional to 218,662.82, 328,040.25 and 123,938.39

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Solution

The fourth proportional to 218,662.82, 328,040.25 and 123,938.39 is: 185,933.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,662.82 : 328,040.25 = 123,938.39 : x
  2. Step 2: Convert to fraction form
    218,662.82/328,040.25 = 123,938.39/x
  3. Step 3: Cross multiply
    218,662.82x = 328,040.25 × 123,938.39
  4. Step 4: Simplify right side
    218,662.82x = 40,656,778,800.00
  5. Step 5: Solve for x
    x = 40,656,778,800.00/218,662.82
  6. Step 6: Final answer
    x = 185,933.67

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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.