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Finding the Fourth Proportional to 71,572.10, 107,370.30 and 21,651.80

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Solution

The fourth proportional to 71,572.10, 107,370.30 and 21,651.80 is: 32,481.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,572.10 : 107,370.30 = 21,651.80 : x
  2. Step 2: Convert to fraction form
    71,572.10/107,370.30 = 21,651.80/x
  3. Step 3: Cross multiply
    71,572.10x = 107,370.30 × 21,651.80
  4. Step 4: Simplify right side
    71,572.10x = 2,324,760,261.54
  5. Step 5: Solve for x
    x = 2,324,760,261.54/71,572.10
  6. Step 6: Final answer
    x = 32,481.38

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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.