Finding the Fourth Proportional to 128,287.36, 176,920.64 and 80,545.92
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Solution
The fourth proportional to 128,287.36, 176,920.64 and 80,545.92 is: 111,080.59
Step by Step Solution
- Step 1: Write the proportion equation
128,287.36 : 176,920.64 = 80,545.92 : x - Step 2: Convert to fraction form
128,287.36/176,920.64 = 80,545.92/x - Step 3: Cross multiply
128,287.36x = 176,920.64 × 80,545.92 - Step 4: Simplify right side
128,287.36x = 14,250,235,715.79 - Step 5: Solve for x
x = 14,250,235,715.79/128,287.36 - Step 6: Final answer
x = 111,080.59
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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.