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Finding the Fourth Proportional to 45,467.76, 68,231 and 19,172.64

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Solution

The fourth proportional to 45,467.76, 68,231 and 19,172.64 is: 28,771.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,467.76 : 68,231 = 19,172.64 : x
  2. Step 2: Convert to fraction form
    45,467.76/68,231 = 19,172.64/x
  3. Step 3: Cross multiply
    45,467.76x = 68,231 × 19,172.64
  4. Step 4: Simplify right side
    45,467.76x = 1,308,168,399.84
  5. Step 5: Solve for x
    x = 1,308,168,399.84/45,467.76
  6. Step 6: Final answer
    x = 28,771.34

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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.