Finding the Fourth Proportional to 122,717.65, 169,267.11 and 79,620.15
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Solution
The fourth proportional to 122,717.65, 169,267.11 and 79,620.15 is: 109,821.79
Step by Step Solution
- Step 1: Write the proportion equation
122,717.65 : 169,267.11 = 79,620.15 : x - Step 2: Convert to fraction form
122,717.65/169,267.11 = 79,620.15/x - Step 3: Cross multiply
122,717.65x = 169,267.11 × 79,620.15 - Step 4: Simplify right side
122,717.65x = 13,477,071,771.25 - Step 5: Solve for x
x = 13,477,071,771.25/122,717.65 - Step 6: Final answer
x = 109,821.79
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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.