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Finding the Fourth Proportional to 81,383.50, 122,076.01 and 28,801.90

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Solution

The fourth proportional to 81,383.50, 122,076.01 and 28,801.90 is: 43,203.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,383.50 : 122,076.01 = 28,801.90 : x
  2. Step 2: Convert to fraction form
    81,383.50/122,076.01 = 28,801.90/x
  3. Step 3: Cross multiply
    81,383.50x = 122,076.01 × 28,801.90
  4. Step 4: Simplify right side
    81,383.50x = 3,516,021,032.42
  5. Step 5: Solve for x
    x = 3,516,021,032.42/81,383.50
  6. Step 6: Final answer
    x = 43,203.12

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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.