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Finding the Fourth Proportional to 92,722.90, 138,739.69 and 55,303.33

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Solution

The fourth proportional to 92,722.90, 138,739.69 and 55,303.33 is: 82,749.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,722.90 : 138,739.69 = 55,303.33 : x
  2. Step 2: Convert to fraction form
    92,722.90/138,739.69 = 55,303.33/x
  3. Step 3: Cross multiply
    92,722.90x = 138,739.69 × 55,303.33
  4. Step 4: Simplify right side
    92,722.90x = 7,672,765,889.95
  5. Step 5: Solve for x
    x = 7,672,765,889.95/92,722.90
  6. Step 6: Final answer
    x = 82,749.42

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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.