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Finding the Fourth Proportional to 87,489.40, 120,735.34 and 47,745.40

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Solution

The fourth proportional to 87,489.40, 120,735.34 and 47,745.40 is: 65,888.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,489.40 : 120,735.34 = 47,745.40 : x
  2. Step 2: Convert to fraction form
    87,489.40/120,735.34 = 47,745.40/x
  3. Step 3: Cross multiply
    87,489.40x = 120,735.34 × 47,745.40
  4. Step 4: Simplify right side
    87,489.40x = 5,764,557,102.44
  5. Step 5: Solve for x
    x = 5,764,557,102.44/87,489.40
  6. Step 6: Final answer
    x = 65,888.63

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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.