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Finding the Fourth Proportional to 65,431.70, 90,288.56 and 36,745.54

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Solution

The fourth proportional to 65,431.70, 90,288.56 and 36,745.54 is: 50,704.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,431.70 : 90,288.56 = 36,745.54 : x
  2. Step 2: Convert to fraction form
    65,431.70/90,288.56 = 36,745.54/x
  3. Step 3: Cross multiply
    65,431.70x = 90,288.56 × 36,745.54
  4. Step 4: Simplify right side
    65,431.70x = 3,317,701,893.02
  5. Step 5: Solve for x
    x = 3,317,701,893.02/65,431.70
  6. Step 6: Final answer
    x = 50,704.81

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1.5x scale

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.