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Finding the Fourth Proportional to 201,390.80, 302,319.60 and 108,078.80

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Solution

The fourth proportional to 201,390.80, 302,319.60 and 108,078.80 is: 162,243.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,390.80 : 302,319.60 = 108,078.80 : x
  2. Step 2: Convert to fraction form
    201,390.80/302,319.60 = 108,078.80/x
  3. Step 3: Cross multiply
    201,390.80x = 302,319.60 × 108,078.80
  4. Step 4: Simplify right side
    201,390.80x = 32,674,339,584.48
  5. Step 5: Solve for x
    x = 32,674,339,584.48/201,390.80
  6. Step 6: Final answer
    x = 162,243.46

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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.