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Finding the Fourth Proportional to 201,481.20, 302,221.80 and 61,221.60

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Solution

The fourth proportional to 201,481.20, 302,221.80 and 61,221.60 is: 91,832.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,481.20 : 302,221.80 = 61,221.60 : x
  2. Step 2: Convert to fraction form
    201,481.20/302,221.80 = 61,221.60/x
  3. Step 3: Cross multiply
    201,481.20x = 302,221.80 × 61,221.60
  4. Step 4: Simplify right side
    201,481.20x = 18,502,502,150.88
  5. Step 5: Solve for x
    x = 18,502,502,150.88/201,481.20
  6. Step 6: Final answer
    x = 91,832.40

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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.