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Finding the Fourth Proportional to 215,880.66, 323,743.23 and 91,231.38

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Solution

The fourth proportional to 215,880.66, 323,743.23 and 91,231.38 is: 136,814.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,880.66 : 323,743.23 = 91,231.38 : x
  2. Step 2: Convert to fraction form
    215,880.66/323,743.23 = 91,231.38/x
  3. Step 3: Cross multiply
    215,880.66x = 323,743.23 × 91,231.38
  4. Step 4: Simplify right side
    215,880.66x = 29,535,541,638.56
  5. Step 5: Solve for x
    x = 29,535,541,638.56/215,880.66
  6. Step 6: Final answer
    x = 136,814.21

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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.