Finding the Fourth Proportional to 136,719.77, 188,672.91 and 76,289.75
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Solution
The fourth proportional to 136,719.77, 188,672.91 and 76,289.75 is: 105,279.65
Step by Step Solution
- Step 1: Write the proportion equation
136,719.77 : 188,672.91 = 76,289.75 : x - Step 2: Convert to fraction form
136,719.77/188,672.91 = 76,289.75/x - Step 3: Cross multiply
136,719.77x = 188,672.91 × 76,289.75 - Step 4: Simplify right side
136,719.77x = 14,393,809,135.67 - Step 5: Solve for x
x = 14,393,809,135.67/136,719.77 - Step 6: Final answer
x = 105,279.65
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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.