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Finding the Fourth Proportional to 81,693.56, 122,540.34 and 26,289.56

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Solution

The fourth proportional to 81,693.56, 122,540.34 and 26,289.56 is: 39,434.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,693.56 : 122,540.34 = 26,289.56 : x
  2. Step 2: Convert to fraction form
    81,693.56/122,540.34 = 26,289.56/x
  3. Step 3: Cross multiply
    81,693.56x = 122,540.34 × 26,289.56
  4. Step 4: Simplify right side
    81,693.56x = 3,221,532,025.79
  5. Step 5: Solve for x
    x = 3,221,532,025.79/81,693.56
  6. Step 6: Final answer
    x = 39,434.34

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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.