Finding the Fourth Proportional to 139,821.99, 192,871.80 and 98,940.07
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Solution
The fourth proportional to 139,821.99, 192,871.80 and 98,940.07 is: 136,478.89
Step by Step Solution
- Step 1: Write the proportion equation
139,821.99 : 192,871.80 = 98,940.07 : x - Step 2: Convert to fraction form
139,821.99/192,871.80 = 98,940.07/x - Step 3: Cross multiply
139,821.99x = 192,871.80 × 98,940.07 - Step 4: Simplify right side
139,821.99x = 19,082,749,393.03 - Step 5: Solve for x
x = 19,082,749,393.03/139,821.99 - Step 6: Final answer
x = 136,478.89
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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.