Finding the Fourth Proportional to 81,791.71, 122,687.58 and 25,631.80
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Solution
The fourth proportional to 81,791.71, 122,687.58 and 25,631.80 is: 38,447.70
Step by Step Solution
- Step 1: Write the proportion equation
81,791.71 : 122,687.58 = 25,631.80 : x - Step 2: Convert to fraction form
81,791.71/122,687.58 = 25,631.80/x - Step 3: Cross multiply
81,791.71x = 122,687.58 × 25,631.80 - Step 4: Simplify right side
81,791.71x = 3,144,703,513.04 - Step 5: Solve for x
x = 3,144,703,513.04/81,791.71 - Step 6: Final answer
x = 38,447.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.