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Finding the Fourth Proportional to 144,162.75, 198,943.80 and 79,636.43

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Solution

The fourth proportional to 144,162.75, 198,943.80 and 79,636.43 is: 109,897.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,162.75 : 198,943.80 = 79,636.43 : x
  2. Step 2: Convert to fraction form
    144,162.75/198,943.80 = 79,636.43/x
  3. Step 3: Cross multiply
    144,162.75x = 198,943.80 × 79,636.43
  4. Step 4: Simplify right side
    144,162.75x = 15,843,173,157.23
  5. Step 5: Solve for x
    x = 15,843,173,157.23/144,162.75
  6. Step 6: Final answer
    x = 109,897.83

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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.