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Finding the Fourth Proportional to 201,991.40, 302,549.70 and 131,132.60

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Solution

The fourth proportional to 201,991.40, 302,549.70 and 131,132.60 is: 196,414.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,991.40 : 302,549.70 = 131,132.60 : x
  2. Step 2: Convert to fraction form
    201,991.40/302,549.70 = 131,132.60/x
  3. Step 3: Cross multiply
    201,991.40x = 302,549.70 × 131,132.60
  4. Step 4: Simplify right side
    201,991.40x = 39,674,128,790.22
  5. Step 5: Solve for x
    x = 39,674,128,790.22/201,991.40
  6. Step 6: Final answer
    x = 196,414.94

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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.