Finding the Fourth Proportional to 128,310.91, 177,075.79 and 77,339.84
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Solution
The fourth proportional to 128,310.91, 177,075.79 and 77,339.84 is: 106,733.03
Step by Step Solution
- Step 1: Write the proportion equation
128,310.91 : 177,075.79 = 77,339.84 : x - Step 2: Convert to fraction form
128,310.91/177,075.79 = 77,339.84/x - Step 3: Cross multiply
128,310.91x = 177,075.79 × 77,339.84 - Step 4: Simplify right side
128,310.91x = 13,695,012,187.75 - Step 5: Solve for x
x = 13,695,012,187.75/128,310.91 - Step 6: Final answer
x = 106,733.03
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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.