Finding the Fourth Proportional to 136,717.50, 188,641.98 and 78,562.99
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Solution
The fourth proportional to 136,717.50, 188,641.98 and 78,562.99 is: 108,400.74
Step by Step Solution
- Step 1: Write the proportion equation
136,717.50 : 188,641.98 = 78,562.99 : x - Step 2: Convert to fraction form
136,717.50/188,641.98 = 78,562.99/x - Step 3: Cross multiply
136,717.50x = 188,641.98 × 78,562.99 - Step 4: Simplify right side
136,717.50x = 14,820,278,456.16 - Step 5: Solve for x
x = 14,820,278,456.16/136,717.50 - Step 6: Final answer
x = 108,400.74
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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.