Finding the Fourth Proportional to 128,660.11, 177,530.28 and 80,879.63
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Solution
The fourth proportional to 128,660.11, 177,530.28 and 80,879.63 is: 111,600.89
Step by Step Solution
- Step 1: Write the proportion equation
128,660.11 : 177,530.28 = 80,879.63 : x - Step 2: Convert to fraction form
128,660.11/177,530.28 = 80,879.63/x - Step 3: Cross multiply
128,660.11x = 177,530.28 × 80,879.63 - Step 4: Simplify right side
128,660.11x = 14,358,582,068.15 - Step 5: Solve for x
x = 14,358,582,068.15/128,660.11 - Step 6: Final answer
x = 111,600.89
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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.