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Finding the Fourth Proportional to 45,468.60, 68,202.72 and 20,479.38

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Solution

The fourth proportional to 45,468.60, 68,202.72 and 20,479.38 is: 30,718.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,468.60 : 68,202.72 = 20,479.38 : x
  2. Step 2: Convert to fraction form
    45,468.60/68,202.72 = 20,479.38/x
  3. Step 3: Cross multiply
    45,468.60x = 68,202.72 × 20,479.38
  4. Step 4: Simplify right side
    45,468.60x = 1,396,749,419.91
  5. Step 5: Solve for x
    x = 1,396,749,419.91/45,468.60
  6. Step 6: Final answer
    x = 30,718.99

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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.