Finding the Fourth Proportional to 136,824.12, 188,821.26 and 76,393.80
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Solution
The fourth proportional to 136,824.12, 188,821.26 and 76,393.80 is: 105,425.66
Step by Step Solution
- Step 1: Write the proportion equation
136,824.12 : 188,821.26 = 76,393.80 : x - Step 2: Convert to fraction form
136,824.12/188,821.26 = 76,393.80/x - Step 3: Cross multiply
136,824.12x = 188,821.26 × 76,393.80 - Step 4: Simplify right side
136,824.12x = 14,424,773,572.19 - Step 5: Solve for x
x = 14,424,773,572.19/136,824.12 - Step 6: Final answer
x = 105,425.66
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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.