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Finding the Fourth Proportional to 213,636.38, 320,455.26 and 80,480.88

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Solution

The fourth proportional to 213,636.38, 320,455.26 and 80,480.88 is: 120,721.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,636.38 : 320,455.26 = 80,480.88 : x
  2. Step 2: Convert to fraction form
    213,636.38/320,455.26 = 80,480.88/x
  3. Step 3: Cross multiply
    213,636.38x = 320,455.26 × 80,480.88
  4. Step 4: Simplify right side
    213,636.38x = 25,790,521,325.43
  5. Step 5: Solve for x
    x = 25,790,521,325.43/213,636.38
  6. Step 6: Final answer
    x = 120,721.58

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1.5x scale

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.