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Finding the Fourth Proportional to 143,940.84, 198,673.95 and 98,076.30

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Solution

The fourth proportional to 143,940.84, 198,673.95 and 98,076.30 is: 135,369.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,940.84 : 198,673.95 = 98,076.30 : x
  2. Step 2: Convert to fraction form
    143,940.84/198,673.95 = 98,076.30/x
  3. Step 3: Cross multiply
    143,940.84x = 198,673.95 × 98,076.30
  4. Step 4: Simplify right side
    143,940.84x = 19,485,205,922.39
  5. Step 5: Solve for x
    x = 19,485,205,922.39/143,940.84
  6. Step 6: Final answer
    x = 135,369.54

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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.