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Finding the Fourth Proportional to 81,188.35, 121,768.17 and 22,028.63

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Solution

The fourth proportional to 81,188.35, 121,768.17 and 22,028.63 is: 33,039.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,188.35 : 121,768.17 = 22,028.63 : x
  2. Step 2: Convert to fraction form
    81,188.35/121,768.17 = 22,028.63/x
  3. Step 3: Cross multiply
    81,188.35x = 121,768.17 × 22,028.63
  4. Step 4: Simplify right side
    81,188.35x = 2,682,385,962.71
  5. Step 5: Solve for x
    x = 2,682,385,962.71/81,188.35
  6. Step 6: Final answer
    x = 33,039.05

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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.