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Finding the Fourth Proportional to 201,696.20, 302,609.10 and 135,211.40

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Solution

The fourth proportional to 201,696.20, 302,609.10 and 135,211.40 is: 202,860.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,696.20 : 302,609.10 = 135,211.40 : x
  2. Step 2: Convert to fraction form
    201,696.20/302,609.10 = 135,211.40/x
  3. Step 3: Cross multiply
    201,696.20x = 302,609.10 × 135,211.40
  4. Step 4: Simplify right side
    201,696.20x = 40,916,200,063.74
  5. Step 5: Solve for x
    x = 40,916,200,063.74/201,696.20
  6. Step 6: Final answer
    x = 202,860.54

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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.