Home / 71,021.21-106,513.38-21,089.57

Finding the Fourth Proportional to 71,021.21, 106,513.38 and 21,089.57

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Solution

The fourth proportional to 71,021.21, 106,513.38 and 21,089.57 is: 31,628.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,021.21 : 106,513.38 = 21,089.57 : x
  2. Step 2: Convert to fraction form
    71,021.21/106,513.38 = 21,089.57/x
  3. Step 3: Cross multiply
    71,021.21x = 106,513.38 × 21,089.57
  4. Step 4: Simplify right side
    71,021.21x = 2,246,320,850.88
  5. Step 5: Solve for x
    x = 2,246,320,850.88/71,021.21
  6. Step 6: Final answer
    x = 31,628.88

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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.