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Finding the Fourth Proportional to 81,486.81, 122,237.91 and 28,883.79

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Solution

The fourth proportional to 81,486.81, 122,237.91 and 28,883.79 is: 43,328.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,486.81 : 122,237.91 = 28,883.79 : x
  2. Step 2: Convert to fraction form
    81,486.81/122,237.91 = 28,883.79/x
  3. Step 3: Cross multiply
    81,486.81x = 122,237.91 × 28,883.79
  4. Step 4: Simplify right side
    81,486.81x = 3,530,694,122.48
  5. Step 5: Solve for x
    x = 3,530,694,122.48/81,486.81
  6. Step 6: Final answer
    x = 43,328.41

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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.