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Finding the Fourth Proportional to 326,012.13, 488,976.62 and 126,195.80

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Solution

The fourth proportional to 326,012.13, 488,976.62 and 126,195.80 is: 189,277.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,012.13 : 488,976.62 = 126,195.80 : x
  2. Step 2: Convert to fraction form
    326,012.13/488,976.62 = 126,195.80/x
  3. Step 3: Cross multiply
    326,012.13x = 488,976.62 × 126,195.80
  4. Step 4: Simplify right side
    326,012.13x = 61,706,792,666.33
  5. Step 5: Solve for x
    x = 61,706,792,666.33/326,012.13
  6. Step 6: Final answer
    x = 189,277.60

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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.