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Finding the Fourth Proportional to 192,075.20, 288,112.80 and 81,252.80

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Solution

The fourth proportional to 192,075.20, 288,112.80 and 81,252.80 is: 121,879.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,075.20 : 288,112.80 = 81,252.80 : x
  2. Step 2: Convert to fraction form
    192,075.20/288,112.80 = 81,252.80/x
  3. Step 3: Cross multiply
    192,075.20x = 288,112.80 × 81,252.80
  4. Step 4: Simplify right side
    192,075.20x = 23,409,971,715.84
  5. Step 5: Solve for x
    x = 23,409,971,715.84/192,075.20
  6. Step 6: Final answer
    x = 121,879.20

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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.