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Finding the Fourth Proportional to 72,297.41, 99,769.39 and 40,028.94

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Solution

The fourth proportional to 72,297.41, 99,769.39 and 40,028.94 is: 55,239.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,297.41 : 99,769.39 = 40,028.94 : x
  2. Step 2: Convert to fraction form
    72,297.41/99,769.39 = 40,028.94/x
  3. Step 3: Cross multiply
    72,297.41x = 99,769.39 × 40,028.94
  4. Step 4: Simplify right side
    72,297.41x = 3,993,662,826.07
  5. Step 5: Solve for x
    x = 3,993,662,826.07/72,297.41
  6. Step 6: Final answer
    x = 55,239.37

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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.