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Finding the Fourth Proportional to 71,696.36, 107,544.30 and 18,388.28

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Solution

The fourth proportional to 71,696.36, 107,544.30 and 18,388.28 is: 27,582.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,696.36 : 107,544.30 = 18,388.28 : x
  2. Step 2: Convert to fraction form
    71,696.36/107,544.30 = 18,388.28/x
  3. Step 3: Cross multiply
    71,696.36x = 107,544.30 × 18,388.28
  4. Step 4: Simplify right side
    71,696.36x = 1,977,554,700.80
  5. Step 5: Solve for x
    x = 1,977,554,700.80/71,696.36
  6. Step 6: Final answer
    x = 27,582.36

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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.