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Finding the Fourth Proportional to 143,960, 198,664.80 and 84,344

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Solution

The fourth proportional to 143,960, 198,664.80 and 84,344 is: 116,394.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,960 : 198,664.80 = 84,344 : x
  2. Step 2: Convert to fraction form
    143,960/198,664.80 = 84,344/x
  3. Step 3: Cross multiply
    143,960x = 198,664.80 × 84,344
  4. Step 4: Simplify right side
    143,960x = 16,756,183,891.20
  5. Step 5: Solve for x
    x = 16,756,183,891.20/143,960
  6. Step 6: Final answer
    x = 116,394.72

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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.