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Finding the Fourth Proportional to 53,738.20, 80,607.30 and 20,906.20

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Solution

The fourth proportional to 53,738.20, 80,607.30 and 20,906.20 is: 31,359.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,738.20 : 80,607.30 = 20,906.20 : x
  2. Step 2: Convert to fraction form
    53,738.20/80,607.30 = 20,906.20/x
  3. Step 3: Cross multiply
    53,738.20x = 80,607.30 × 20,906.20
  4. Step 4: Simplify right side
    53,738.20x = 1,685,192,335.26
  5. Step 5: Solve for x
    x = 1,685,192,335.26/53,738.20
  6. Step 6: Final answer
    x = 31,359.30

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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.