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Finding the Fourth Proportional to 45,378.72, 68,071.68 and 14,213.88

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Solution

The fourth proportional to 45,378.72, 68,071.68 and 14,213.88 is: 21,321.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,378.72 : 68,071.68 = 14,213.88 : x
  2. Step 2: Convert to fraction form
    45,378.72/68,071.68 = 14,213.88/x
  3. Step 3: Cross multiply
    45,378.72x = 68,071.68 × 14,213.88
  4. Step 4: Simplify right side
    45,378.72x = 967,562,690.92
  5. Step 5: Solve for x
    x = 967,562,690.92/45,378.72
  6. Step 6: Final answer
    x = 21,321.95

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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.