Finding the Fourth Proportional to 136,920.14, 188,947.70 and 76,491.66
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Solution
The fourth proportional to 136,920.14, 188,947.70 and 76,491.66 is: 105,557.32
Step by Step Solution
- Step 1: Write the proportion equation
136,920.14 : 188,947.70 = 76,491.66 : x - Step 2: Convert to fraction form
136,920.14/188,947.70 = 76,491.66/x - Step 3: Cross multiply
136,920.14x = 188,947.70 × 76,491.66 - Step 4: Simplify right side
136,920.14x = 14,452,923,226.18 - Step 5: Solve for x
x = 14,452,923,226.18/136,920.14 - Step 6: Final answer
x = 105,557.32
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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.