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Finding the Fourth Proportional to 223,891.05, 308,732.87 and 172,912.08

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Solution

The fourth proportional to 223,891.05, 308,732.87 and 172,912.08 is: 238,435.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,891.05 : 308,732.87 = 172,912.08 : x
  2. Step 2: Convert to fraction form
    223,891.05/308,732.87 = 172,912.08/x
  3. Step 3: Cross multiply
    223,891.05x = 308,732.87 × 172,912.08
  4. Step 4: Simplify right side
    223,891.05x = 53,383,641,851.51
  5. Step 5: Solve for x
    x = 53,383,641,851.51/223,891.05
  6. Step 6: Final answer
    x = 238,435.80

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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.