Home / 137,273.28-205,940.16-78,136.80

Finding the Fourth Proportional to 137,273.28, 205,940.16 and 78,136.80

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Solution

The fourth proportional to 137,273.28, 205,940.16 and 78,136.80 is: 117,222.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,273.28 : 205,940.16 = 78,136.80 : x
  2. Step 2: Convert to fraction form
    137,273.28/205,940.16 = 78,136.80/x
  3. Step 3: Cross multiply
    137,273.28x = 205,940.16 × 78,136.80
  4. Step 4: Simplify right side
    137,273.28x = 16,091,505,093.89
  5. Step 5: Solve for x
    x = 16,091,505,093.89/137,273.28
  6. Step 6: Final answer
    x = 117,222.41

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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.