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Finding the Fourth Proportional to 81,424.88, 122,035.94 and 39,297.33

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Solution

The fourth proportional to 81,424.88, 122,035.94 and 39,297.33 is: 58,897.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,424.88 : 122,035.94 = 39,297.33 : x
  2. Step 2: Convert to fraction form
    81,424.88/122,035.94 = 39,297.33/x
  3. Step 3: Cross multiply
    81,424.88x = 122,035.94 × 39,297.33
  4. Step 4: Simplify right side
    81,424.88x = 4,795,686,409.55
  5. Step 5: Solve for x
    x = 4,795,686,409.55/81,424.88
  6. Step 6: Final answer
    x = 58,897.07

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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.