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Finding the Fourth Proportional to 247,946.40, 372,016.80 and 90,190.80

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Solution

The fourth proportional to 247,946.40, 372,016.80 and 90,190.80 is: 135,321.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,946.40 : 372,016.80 = 90,190.80 : x
  2. Step 2: Convert to fraction form
    247,946.40/372,016.80 = 90,190.80/x
  3. Step 3: Cross multiply
    247,946.40x = 372,016.80 × 90,190.80
  4. Step 4: Simplify right side
    247,946.40x = 33,552,492,805.44
  5. Step 5: Solve for x
    x = 33,552,492,805.44/247,946.40
  6. Step 6: Final answer
    x = 135,321.56

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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.