Finding the Fourth Proportional to 84,021.76, 115,872.06 and 61,324.80
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Solution
The fourth proportional to 84,021.76, 115,872.06 and 61,324.80 is: 84,571.32
Step by Step Solution
- Step 1: Write the proportion equation
84,021.76 : 115,872.06 = 61,324.80 : x - Step 2: Convert to fraction form
84,021.76/115,872.06 = 61,324.80/x - Step 3: Cross multiply
84,021.76x = 115,872.06 × 61,324.80 - Step 4: Simplify right side
84,021.76x = 7,105,830,905.09 - Step 5: Solve for x
x = 7,105,830,905.09/84,021.76 - Step 6: Final answer
x = 84,571.32
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1.5x scale
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.