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Finding the Fourth Proportional to 71,258.73, 106,891.53 and 18,668.26

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Solution

The fourth proportional to 71,258.73, 106,891.53 and 18,668.26 is: 28,003.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,258.73 : 106,891.53 = 18,668.26 : x
  2. Step 2: Convert to fraction form
    71,258.73/106,891.53 = 18,668.26/x
  3. Step 3: Cross multiply
    71,258.73x = 106,891.53 × 18,668.26
  4. Step 4: Simplify right side
    71,258.73x = 1,995,478,873.84
  5. Step 5: Solve for x
    x = 1,995,478,873.84/71,258.73
  6. Step 6: Final answer
    x = 28,003.29

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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.