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Finding the Fourth Proportional to 326,107.70, 489,234.45 and 126,410.30

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Solution

The fourth proportional to 326,107.70, 489,234.45 and 126,410.30 is: 189,643.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,107.70 : 489,234.45 = 126,410.30 : x
  2. Step 2: Convert to fraction form
    326,107.70/489,234.45 = 126,410.30/x
  3. Step 3: Cross multiply
    326,107.70x = 489,234.45 × 126,410.30
  4. Step 4: Simplify right side
    326,107.70x = 61,844,273,594.84
  5. Step 5: Solve for x
    x = 61,844,273,594.84/326,107.70
  6. Step 6: Final answer
    x = 189,643.71

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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.