Home / 192,811.20-289,039.67-66,421.38

Finding the Fourth Proportional to 192,811.20, 289,039.67 and 66,421.38

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Solution

The fourth proportional to 192,811.20, 289,039.67 and 66,421.38 is: 99,571.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,811.20 : 289,039.67 = 66,421.38 : x
  2. Step 2: Convert to fraction form
    192,811.20/289,039.67 = 66,421.38/x
  3. Step 3: Cross multiply
    192,811.20x = 289,039.67 × 66,421.38
  4. Step 4: Simplify right side
    192,811.20x = 19,198,413,756.14
  5. Step 5: Solve for x
    x = 19,198,413,756.14/192,811.20
  6. Step 6: Final answer
    x = 99,571.05

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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.