Finding the Fourth Proportional to 128,021.80, 192,069.80 and 39,288.40
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Solution
The fourth proportional to 128,021.80, 192,069.80 and 39,288.40 is: 58,943.99
Step by Step Solution
- Step 1: Write the proportion equation
128,021.80 : 192,069.80 = 39,288.40 : x - Step 2: Convert to fraction form
128,021.80/192,069.80 = 39,288.40/x - Step 3: Cross multiply
128,021.80x = 192,069.80 × 39,288.40 - Step 4: Simplify right side
128,021.80x = 7,546,115,130.32 - Step 5: Solve for x
x = 7,546,115,130.32/128,021.80 - Step 6: Final answer
x = 58,943.99
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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.