Home / 139,940.28-209,760.75-79,839.25

Finding the Fourth Proportional to 139,940.28, 209,760.75 and 79,839.25

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Solution

The fourth proportional to 139,940.28, 209,760.75 and 79,839.25 is: 119,673.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,940.28 : 209,760.75 = 79,839.25 : x
  2. Step 2: Convert to fraction form
    139,940.28/209,760.75 = 79,839.25/x
  3. Step 3: Cross multiply
    139,940.28x = 209,760.75 × 79,839.25
  4. Step 4: Simplify right side
    139,940.28x = 16,747,140,959.44
  5. Step 5: Solve for x
    x = 16,747,140,959.44/139,940.28
  6. Step 6: Final answer
    x = 119,673.48

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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.