Home / 81,636.20-122,454.30-68,514.20

Finding the Fourth Proportional to 81,636.20, 122,454.30 and 68,514.20

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Solution

The fourth proportional to 81,636.20, 122,454.30 and 68,514.20 is: 102,771.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,636.20 : 122,454.30 = 68,514.20 : x
  2. Step 2: Convert to fraction form
    81,636.20/122,454.30 = 68,514.20/x
  3. Step 3: Cross multiply
    81,636.20x = 122,454.30 × 68,514.20
  4. Step 4: Simplify right side
    81,636.20x = 8,389,858,401.06
  5. Step 5: Solve for x
    x = 8,389,858,401.06/81,636.20
  6. Step 6: Final answer
    x = 102,771.30

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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.