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Finding the Fourth Proportional to 201,739.60, 302,609.40 and 130,880.80

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Solution

The fourth proportional to 201,739.60, 302,609.40 and 130,880.80 is: 196,321.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,739.60 : 302,609.40 = 130,880.80 : x
  2. Step 2: Convert to fraction form
    201,739.60/302,609.40 = 130,880.80/x
  3. Step 3: Cross multiply
    201,739.60x = 302,609.40 × 130,880.80
  4. Step 4: Simplify right side
    201,739.60x = 39,605,760,359.52
  5. Step 5: Solve for x
    x = 39,605,760,359.52/201,739.60
  6. Step 6: Final answer
    x = 196,321.20

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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.