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Finding the Fourth Proportional to 308,065.92, 425,115.69 and 172,072.79

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Solution

The fourth proportional to 308,065.92, 425,115.69 and 172,072.79 is: 237,451.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,065.92 : 425,115.69 = 172,072.79 : x
  2. Step 2: Convert to fraction form
    308,065.92/425,115.69 = 172,072.79/x
  3. Step 3: Cross multiply
    308,065.92x = 425,115.69 × 172,072.79
  4. Step 4: Simplify right side
    308,065.92x = 73,150,840,725.50
  5. Step 5: Solve for x
    x = 73,150,840,725.50/308,065.92
  6. Step 6: Final answer
    x = 237,451.91

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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.