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Finding the Fourth Proportional to 217,783.05, 326,715.89 and 75,622.79

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Solution

The fourth proportional to 217,783.05, 326,715.89 and 75,622.79 is: 113,448.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,783.05 : 326,715.89 = 75,622.79 : x
  2. Step 2: Convert to fraction form
    217,783.05/326,715.89 = 75,622.79/x
  3. Step 3: Cross multiply
    217,783.05x = 326,715.89 × 75,622.79
  4. Step 4: Simplify right side
    217,783.05x = 24,707,165,127.44
  5. Step 5: Solve for x
    x = 24,707,165,127.44/217,783.05
  6. Step 6: Final answer
    x = 113,448.52

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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.