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Finding the Fourth Proportional to 62,290.26, 85,947.42 and 39,621

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Solution

The fourth proportional to 62,290.26, 85,947.42 and 39,621 is: 54,668.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,290.26 : 85,947.42 = 39,621 : x
  2. Step 2: Convert to fraction form
    62,290.26/85,947.42 = 39,621/x
  3. Step 3: Cross multiply
    62,290.26x = 85,947.42 × 39,621
  4. Step 4: Simplify right side
    62,290.26x = 3,405,322,727.82
  5. Step 5: Solve for x
    x = 3,405,322,727.82/62,290.26
  6. Step 6: Final answer
    x = 54,668.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.