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Finding the Fourth Proportional to 43,459.20, 65,169.60 and 20,092.80

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Solution

The fourth proportional to 43,459.20, 65,169.60 and 20,092.80 is: 30,130.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,459.20 : 65,169.60 = 20,092.80 : x
  2. Step 2: Convert to fraction form
    43,459.20/65,169.60 = 20,092.80/x
  3. Step 3: Cross multiply
    43,459.20x = 65,169.60 × 20,092.80
  4. Step 4: Simplify right side
    43,459.20x = 1,309,439,738.88
  5. Step 5: Solve for x
    x = 1,309,439,738.88/43,459.20
  6. Step 6: Final answer
    x = 30,130.32

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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.