Finding the Fourth Proportional to 128,251.87, 177,101.06 and 79,936.26
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Solution
The fourth proportional to 128,251.87, 177,101.06 and 79,936.26 is: 110,382.77
Step by Step Solution
- Step 1: Write the proportion equation
128,251.87 : 177,101.06 = 79,936.26 : x - Step 2: Convert to fraction form
128,251.87/177,101.06 = 79,936.26/x - Step 3: Cross multiply
128,251.87x = 177,101.06 × 79,936.26 - Step 4: Simplify right side
128,251.87x = 14,156,796,378.44 - Step 5: Solve for x
x = 14,156,796,378.44/128,251.87 - Step 6: Final answer
x = 110,382.77
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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.