Finding the Fourth Proportional to 143,035.86, 197,391.99 and 78,511.14
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Solution
The fourth proportional to 143,035.86, 197,391.99 and 78,511.14 is: 108,346.75
Step by Step Solution
- Step 1: Write the proportion equation
143,035.86 : 197,391.99 = 78,511.14 : x - Step 2: Convert to fraction form
143,035.86/197,391.99 = 78,511.14/x - Step 3: Cross multiply
143,035.86x = 197,391.99 × 78,511.14 - Step 4: Simplify right side
143,035.86x = 15,497,470,161.77 - Step 5: Solve for x
x = 15,497,470,161.77/143,035.86 - Step 6: Final answer
x = 108,346.75
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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.