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Finding the Fourth Proportional to 71,481.94, 98,656.91 and 39,661.09

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Solution

The fourth proportional to 71,481.94, 98,656.91 and 39,661.09 is: 54,738.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,481.94 : 98,656.91 = 39,661.09 : x
  2. Step 2: Convert to fraction form
    71,481.94/98,656.91 = 39,661.09/x
  3. Step 3: Cross multiply
    71,481.94x = 98,656.91 × 39,661.09
  4. Step 4: Simplify right side
    71,481.94x = 3,912,840,586.63
  5. Step 5: Solve for x
    x = 3,912,840,586.63/71,481.94
  6. Step 6: Final answer
    x = 54,738.87

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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.