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Finding the Fourth Proportional to 279,669.92, 419,563.44 and 90,144.48

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Solution

The fourth proportional to 279,669.92, 419,563.44 and 90,144.48 is: 135,235.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,669.92 : 419,563.44 = 90,144.48 : x
  2. Step 2: Convert to fraction form
    279,669.92/419,563.44 = 90,144.48/x
  3. Step 3: Cross multiply
    279,669.92x = 419,563.44 × 90,144.48
  4. Step 4: Simplify right side
    279,669.92x = 37,821,328,125.81
  5. Step 5: Solve for x
    x = 37,821,328,125.81/279,669.92
  6. Step 6: Final answer
    x = 135,235.60

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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.