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Finding the Fourth Proportional to 201,561.76, 302,359.40 and 61,321.60

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Solution

The fourth proportional to 201,561.76, 302,359.40 and 61,321.60 is: 91,987.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,561.76 : 302,359.40 = 61,321.60 : x
  2. Step 2: Convert to fraction form
    201,561.76/302,359.40 = 61,321.60/x
  3. Step 3: Cross multiply
    201,561.76x = 302,359.40 × 61,321.60
  4. Step 4: Simplify right side
    201,561.76x = 18,541,162,183.04
  5. Step 5: Solve for x
    x = 18,541,162,183.04/201,561.76
  6. Step 6: Final answer
    x = 91,987.50

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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.