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Finding the Fourth Proportional to 144,682.70, 199,662.21 and 81,021.96

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Solution

The fourth proportional to 144,682.70, 199,662.21 and 81,021.96 is: 111,810.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,682.70 : 199,662.21 = 81,021.96 : x
  2. Step 2: Convert to fraction form
    144,682.70/199,662.21 = 81,021.96/x
  3. Step 3: Cross multiply
    144,682.70x = 199,662.21 × 81,021.96
  4. Step 4: Simplify right side
    144,682.70x = 16,177,023,592.13
  5. Step 5: Solve for x
    x = 16,177,023,592.13/144,682.70
  6. Step 6: Final answer
    x = 111,810.36

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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.