Finding the Fourth Proportional to 144,640.05, 216,992.79 and 78,078.75
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Solution
The fourth proportional to 144,640.05, 216,992.79 and 78,078.75 is: 117,135.79
Step by Step Solution
- Step 1: Write the proportion equation
144,640.05 : 216,992.79 = 78,078.75 : x - Step 2: Convert to fraction form
144,640.05/216,992.79 = 78,078.75/x - Step 3: Cross multiply
144,640.05x = 216,992.79 × 78,078.75 - Step 4: Simplify right side
144,640.05x = 16,942,525,802.21 - Step 5: Solve for x
x = 16,942,525,802.21/144,640.05 - Step 6: Final answer
x = 117,135.79
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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.