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Finding the Fourth Proportional to 81,129, 111,958.02 and 45,801

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Solution

The fourth proportional to 81,129, 111,958.02 and 45,801 is: 63,205.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,129 : 111,958.02 = 45,801 : x
  2. Step 2: Convert to fraction form
    81,129/111,958.02 = 45,801/x
  3. Step 3: Cross multiply
    81,129x = 111,958.02 × 45,801
  4. Step 4: Simplify right side
    81,129x = 5,127,789,274.02
  5. Step 5: Solve for x
    x = 5,127,789,274.02/81,129
  6. Step 6: Final answer
    x = 63,205.38

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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.