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Finding the Fourth Proportional to 70,282.75, 105,424.23 and 28,729.75

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Solution

The fourth proportional to 70,282.75, 105,424.23 and 28,729.75 is: 43,094.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,282.75 : 105,424.23 = 28,729.75 : x
  2. Step 2: Convert to fraction form
    70,282.75/105,424.23 = 28,729.75/x
  3. Step 3: Cross multiply
    70,282.75x = 105,424.23 × 28,729.75
  4. Step 4: Simplify right side
    70,282.75x = 3,028,811,771.84
  5. Step 5: Solve for x
    x = 3,028,811,771.84/70,282.75
  6. Step 6: Final answer
    x = 43,094.67

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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.