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Finding the Fourth Proportional to 144,756, 199,763.28 and 81,093.78

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Solution

The fourth proportional to 144,756, 199,763.28 and 81,093.78 is: 111,909.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,756 : 199,763.28 = 81,093.78 : x
  2. Step 2: Convert to fraction form
    144,756/199,763.28 = 81,093.78/x
  3. Step 3: Cross multiply
    144,756x = 199,763.28 × 81,093.78
  4. Step 4: Simplify right side
    144,756x = 16,199,559,480.40
  5. Step 5: Solve for x
    x = 16,199,559,480.40/144,756
  6. Step 6: Final answer
    x = 111,909.42

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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.