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Finding the Fourth Proportional to 218,876.44, 328,365.42 and 69,131.56

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Solution

The fourth proportional to 218,876.44, 328,365.42 and 69,131.56 is: 103,713.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,876.44 : 328,365.42 = 69,131.56 : x
  2. Step 2: Convert to fraction form
    218,876.44/328,365.42 = 69,131.56/x
  3. Step 3: Cross multiply
    218,876.44x = 328,365.42 × 69,131.56
  4. Step 4: Simplify right side
    218,876.44x = 22,700,413,734.66
  5. Step 5: Solve for x
    x = 22,700,413,734.66/218,876.44
  6. Step 6: Final answer
    x = 103,713.37

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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.