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Finding the Fourth Proportional to 66,721, 92,075 and 41,570.52

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Solution

The fourth proportional to 66,721, 92,075 and 41,570.52 is: 57,367.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,721 : 92,075 = 41,570.52 : x
  2. Step 2: Convert to fraction form
    66,721/92,075 = 41,570.52/x
  3. Step 3: Cross multiply
    66,721x = 92,075 × 41,570.52
  4. Step 4: Simplify right side
    66,721x = 3,827,605,629.00
  5. Step 5: Solve for x
    x = 3,827,605,629.00/66,721
  6. Step 6: Final answer
    x = 57,367.33

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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.