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Finding the Fourth Proportional to 192,443.40, 289,010.70 and 139,912.20

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Solution

The fourth proportional to 192,443.40, 289,010.70 and 139,912.20 is: 210,119.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,443.40 : 289,010.70 = 139,912.20 : x
  2. Step 2: Convert to fraction form
    192,443.40/289,010.70 = 139,912.20/x
  3. Step 3: Cross multiply
    192,443.40x = 289,010.70 × 139,912.20
  4. Step 4: Simplify right side
    192,443.40x = 40,436,122,860.54
  5. Step 5: Solve for x
    x = 40,436,122,860.54/192,443.40
  6. Step 6: Final answer
    x = 210,119.56

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1.5x scale

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.