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Finding the Fourth Proportional to 71,009.40, 106,520.02 and 20,408.60

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Solution

The fourth proportional to 71,009.40, 106,520.02 and 20,408.60 is: 30,614.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,009.40 : 106,520.02 = 20,408.60 : x
  2. Step 2: Convert to fraction form
    71,009.40/106,520.02 = 20,408.60/x
  3. Step 3: Cross multiply
    71,009.40x = 106,520.02 × 20,408.60
  4. Step 4: Simplify right side
    71,009.40x = 2,173,923,896.55
  5. Step 5: Solve for x
    x = 2,173,923,896.55/71,009.40
  6. Step 6: Final answer
    x = 30,614.59

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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.