Finding the Fourth Proportional to 115,619.60, 159,554.08 and 81,212.68
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Solution
The fourth proportional to 115,619.60, 159,554.08 and 81,212.68 is: 112,072.82
Step by Step Solution
- Step 1: Write the proportion equation
115,619.60 : 159,554.08 = 81,212.68 : x - Step 2: Convert to fraction form
115,619.60/159,554.08 = 81,212.68/x - Step 3: Cross multiply
115,619.60x = 159,554.08 × 81,212.68 - Step 4: Simplify right side
115,619.60x = 12,957,814,441.73 - Step 5: Solve for x
x = 12,957,814,441.73/115,619.60 - Step 6: Final answer
x = 112,072.82
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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.