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Finding the Fourth Proportional to 71,771.70, 99,049.32 and 39,940.60

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Solution

The fourth proportional to 71,771.70, 99,049.32 and 39,940.60 is: 55,120.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,771.70 : 99,049.32 = 39,940.60 : x
  2. Step 2: Convert to fraction form
    71,771.70/99,049.32 = 39,940.60/x
  3. Step 3: Cross multiply
    71,771.70x = 99,049.32 × 39,940.60
  4. Step 4: Simplify right side
    71,771.70x = 3,956,089,095.59
  5. Step 5: Solve for x
    x = 3,956,089,095.59/71,771.70
  6. Step 6: Final answer
    x = 55,120.46

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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.