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Finding the Fourth Proportional to 326,108.70, 489,248.10 and 126,435.60

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Solution

The fourth proportional to 326,108.70, 489,248.10 and 126,435.60 is: 189,686.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,108.70 : 489,248.10 = 126,435.60 : x
  2. Step 2: Convert to fraction form
    326,108.70/489,248.10 = 126,435.60/x
  3. Step 3: Cross multiply
    326,108.70x = 489,248.10 × 126,435.60
  4. Step 4: Simplify right side
    326,108.70x = 61,858,377,072.36
  5. Step 5: Solve for x
    x = 61,858,377,072.36/326,108.70
  6. Step 6: Final answer
    x = 189,686.37

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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.