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Finding the Fourth Proportional to 71,290.43, 106,927.44 and 18,704.01

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Solution

The fourth proportional to 71,290.43, 106,927.44 and 18,704.01 is: 28,053.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,290.43 : 106,927.44 = 18,704.01 : x
  2. Step 2: Convert to fraction form
    71,290.43/106,927.44 = 18,704.01/x
  3. Step 3: Cross multiply
    71,290.43x = 106,927.44 × 18,704.01
  4. Step 4: Simplify right side
    71,290.43x = 1,999,972,343.08
  5. Step 5: Solve for x
    x = 1,999,972,343.08/71,290.43
  6. Step 6: Final answer
    x = 28,053.87

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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.