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Finding the Fourth Proportional to 143,568.98, 198,123.21 and 79,906.80

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Solution

The fourth proportional to 143,568.98, 198,123.21 and 79,906.80 is: 110,270.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,568.98 : 198,123.21 = 79,906.80 : x
  2. Step 2: Convert to fraction form
    143,568.98/198,123.21 = 79,906.80/x
  3. Step 3: Cross multiply
    143,568.98x = 198,123.21 × 79,906.80
  4. Step 4: Simplify right side
    143,568.98x = 15,831,391,716.83
  5. Step 5: Solve for x
    x = 15,831,391,716.83/143,568.98
  6. Step 6: Final answer
    x = 110,270.28

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1.5x scale

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.