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Finding the Fourth Proportional to 81,893.60, 122,736.70 and 39,783.32

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Solution

The fourth proportional to 81,893.60, 122,736.70 and 39,783.32 is: 59,624.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,893.60 : 122,736.70 = 39,783.32 : x
  2. Step 2: Convert to fraction form
    81,893.60/122,736.70 = 39,783.32/x
  3. Step 3: Cross multiply
    81,893.60x = 122,736.70 × 39,783.32
  4. Step 4: Simplify right side
    81,893.60x = 4,882,873,411.84
  5. Step 5: Solve for x
    x = 4,882,873,411.84/81,893.60
  6. Step 6: Final answer
    x = 59,624.60

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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.