Finding the Fourth Proportional to 76,129.80, 114,194.70 and 20,725.80
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Solution
The fourth proportional to 76,129.80, 114,194.70 and 20,725.80 is: 31,088.70
Step by Step Solution
- Step 1: Write the proportion equation
76,129.80 : 114,194.70 = 20,725.80 : x - Step 2: Convert to fraction form
76,129.80/114,194.70 = 20,725.80/x - Step 3: Cross multiply
76,129.80x = 114,194.70 × 20,725.80 - Step 4: Simplify right side
76,129.80x = 2,366,776,513.26 - Step 5: Solve for x
x = 2,366,776,513.26/76,129.80 - Step 6: Final answer
x = 31,088.70
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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.