Finding the Fourth Proportional to 115,716.70, 159,619.21 and 76,425.92
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Solution
The fourth proportional to 115,716.70, 159,619.21 and 76,425.92 is: 105,421.65
Step by Step Solution
- Step 1: Write the proportion equation
115,716.70 : 159,619.21 = 76,425.92 : x - Step 2: Convert to fraction form
115,716.70/159,619.21 = 76,425.92/x - Step 3: Cross multiply
115,716.70x = 159,619.21 × 76,425.92 - Step 4: Simplify right side
115,716.70x = 12,199,044,973.92 - Step 5: Solve for x
x = 12,199,044,973.92/115,716.70 - Step 6: Final answer
x = 105,421.65
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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.