Finding the Fourth Proportional to 120,717.18, 166,645.49 and 72,342.09
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Solution
The fourth proportional to 120,717.18, 166,645.49 and 72,342.09 is: 99,865.51
Step by Step Solution
- Step 1: Write the proportion equation
120,717.18 : 166,645.49 = 72,342.09 : x - Step 2: Convert to fraction form
120,717.18/166,645.49 = 72,342.09/x - Step 3: Cross multiply
120,717.18x = 166,645.49 × 72,342.09 - Step 4: Simplify right side
120,717.18x = 12,055,482,673.96 - Step 5: Solve for x
x = 12,055,482,673.96/120,717.18 - Step 6: Final answer
x = 99,865.51
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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.