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Finding the Fourth Proportional to 201,912.40, 302,868.60 and 68,942.80

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Solution

The fourth proportional to 201,912.40, 302,868.60 and 68,942.80 is: 103,414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,912.40 : 302,868.60 = 68,942.80 : x
  2. Step 2: Convert to fraction form
    201,912.40/302,868.60 = 68,942.80/x
  3. Step 3: Cross multiply
    201,912.40x = 302,868.60 × 68,942.80
  4. Step 4: Simplify right side
    201,912.40x = 20,880,609,316.08
  5. Step 5: Solve for x
    x = 20,880,609,316.08/201,912.40
  6. Step 6: Final answer
    x = 103,414.20

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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.