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Finding the Fourth Proportional to 61,255.97, 91,883.92 and 19,139.68

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Solution

The fourth proportional to 61,255.97, 91,883.92 and 19,139.68 is: 28,709.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,255.97 : 91,883.92 = 19,139.68 : x
  2. Step 2: Convert to fraction form
    61,255.97/91,883.92 = 19,139.68/x
  3. Step 3: Cross multiply
    61,255.97x = 91,883.92 × 19,139.68
  4. Step 4: Simplify right side
    61,255.97x = 1,758,628,825.95
  5. Step 5: Solve for x
    x = 1,758,628,825.95/61,255.97
  6. Step 6: Final answer
    x = 28,709.51

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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.