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Finding the Fourth Proportional to 218,528.10, 327,791.66 and 68,781.48

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Solution

The fourth proportional to 218,528.10, 327,791.66 and 68,781.48 is: 103,172.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,528.10 : 327,791.66 = 68,781.48 : x
  2. Step 2: Convert to fraction form
    218,528.10/327,791.66 = 68,781.48/x
  3. Step 3: Cross multiply
    218,528.10x = 327,791.66 × 68,781.48
  4. Step 4: Simplify right side
    218,528.10x = 22,545,995,506.46
  5. Step 5: Solve for x
    x = 22,545,995,506.46/218,528.10
  6. Step 6: Final answer
    x = 103,172.07

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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.