Finding the Fourth Proportional to 86,075.52, 128,716.92 and 81,876.48
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Solution
The fourth proportional to 86,075.52, 128,716.92 and 81,876.48 is: 122,437.70
Step by Step Solution
- Step 1: Write the proportion equation
86,075.52 : 128,716.92 = 81,876.48 : x - Step 2: Convert to fraction form
86,075.52/128,716.92 = 81,876.48/x - Step 3: Cross multiply
86,075.52x = 128,716.92 × 81,876.48 - Step 4: Simplify right side
86,075.52x = 10,538,888,326.04 - Step 5: Solve for x
x = 10,538,888,326.04/86,075.52 - Step 6: Final answer
x = 122,437.70
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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.