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Finding the Fourth Proportional to 70,295.28, 105,481.80 and 28,771.44

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Solution

The fourth proportional to 70,295.28, 105,481.80 and 28,771.44 is: 43,173.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,295.28 : 105,481.80 = 28,771.44 : x
  2. Step 2: Convert to fraction form
    70,295.28/105,481.80 = 28,771.44/x
  3. Step 3: Cross multiply
    70,295.28x = 105,481.80 × 28,771.44
  4. Step 4: Simplify right side
    70,295.28x = 3,034,863,279.79
  5. Step 5: Solve for x
    x = 3,034,863,279.79/70,295.28
  6. Step 6: Final answer
    x = 43,173.07

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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.