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Finding the Fourth Proportional to 61,265.89, 91,738.40 and 40,139.47

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Solution

The fourth proportional to 61,265.89, 91,738.40 and 40,139.47 is: 60,104.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,265.89 : 91,738.40 = 40,139.47 : x
  2. Step 2: Convert to fraction form
    61,265.89/91,738.40 = 40,139.47/x
  3. Step 3: Cross multiply
    61,265.89x = 91,738.40 × 40,139.47
  4. Step 4: Simplify right side
    61,265.89x = 3,682,330,553.95
  5. Step 5: Solve for x
    x = 3,682,330,553.95/61,265.89
  6. Step 6: Final answer
    x = 60,104.09

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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.