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Finding the Fourth Proportional to 192,716.80, 289,075.20 and 133,619.20

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Solution

The fourth proportional to 192,716.80, 289,075.20 and 133,619.20 is: 200,428.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,716.80 : 289,075.20 = 133,619.20 : x
  2. Step 2: Convert to fraction form
    192,716.80/289,075.20 = 133,619.20/x
  3. Step 3: Cross multiply
    192,716.80x = 289,075.20 × 133,619.20
  4. Step 4: Simplify right side
    192,716.80x = 38,625,996,963.84
  5. Step 5: Solve for x
    x = 38,625,996,963.84/192,716.80
  6. Step 6: Final answer
    x = 200,428.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.