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Finding the Fourth Proportional to 70,163.73, 105,232.91 and 20,231.55

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Solution

The fourth proportional to 70,163.73, 105,232.91 and 20,231.55 is: 30,343.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,163.73 : 105,232.91 = 20,231.55 : x
  2. Step 2: Convert to fraction form
    70,163.73/105,232.91 = 20,231.55/x
  3. Step 3: Cross multiply
    70,163.73x = 105,232.91 × 20,231.55
  4. Step 4: Simplify right side
    70,163.73x = 2,129,024,779.15
  5. Step 5: Solve for x
    x = 2,129,024,779.15/70,163.73
  6. Step 6: Final answer
    x = 30,343.67

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1.5x scale

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.