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Finding the Fourth Proportional to 143,411.49, 197,891.79 and 79,745.49

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Solution

The fourth proportional to 143,411.49, 197,891.79 and 79,745.49 is: 110,039.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,411.49 : 197,891.79 = 79,745.49 : x
  2. Step 2: Convert to fraction form
    143,411.49/197,891.79 = 79,745.49/x
  3. Step 3: Cross multiply
    143,411.49x = 197,891.79 × 79,745.49
  4. Step 4: Simplify right side
    143,411.49x = 15,780,977,760.53
  5. Step 5: Solve for x
    x = 15,780,977,760.53/143,411.49
  6. Step 6: Final answer
    x = 110,039.84

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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.