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Finding the Fourth Proportional to 65,928.48, 90,989.28 and 37,249.35

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Solution

The fourth proportional to 65,928.48, 90,989.28 and 37,249.35 is: 51,408.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,928.48 : 90,989.28 = 37,249.35 : x
  2. Step 2: Convert to fraction form
    65,928.48/90,989.28 = 37,249.35/x
  3. Step 3: Cross multiply
    65,928.48x = 90,989.28 × 37,249.35
  4. Step 4: Simplify right side
    65,928.48x = 3,389,291,536.97
  5. Step 5: Solve for x
    x = 3,389,291,536.97/65,928.48
  6. Step 6: Final answer
    x = 51,408.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.