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Finding the Fourth Proportional to 70,295.22, 105,442.86 and 20,375.37

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Solution

The fourth proportional to 70,295.22, 105,442.86 and 20,375.37 is: 30,563.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,295.22 : 105,442.86 = 20,375.37 : x
  2. Step 2: Convert to fraction form
    70,295.22/105,442.86 = 20,375.37/x
  3. Step 3: Cross multiply
    70,295.22x = 105,442.86 × 20,375.37
  4. Step 4: Simplify right side
    70,295.22x = 2,148,437,286.36
  5. Step 5: Solve for x
    x = 2,148,437,286.36/70,295.22
  6. Step 6: Final answer
    x = 30,563.06

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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.