Finding the Fourth Proportional to 139,782.40, 192,902.02 and 79,354.84
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Solution
The fourth proportional to 139,782.40, 192,902.02 and 79,354.84 is: 109,510.99
Step by Step Solution
- Step 1: Write the proportion equation
139,782.40 : 192,902.02 = 79,354.84 : x - Step 2: Convert to fraction form
139,782.40/192,902.02 = 79,354.84/x - Step 3: Cross multiply
139,782.40x = 192,902.02 × 79,354.84 - Step 4: Simplify right side
139,782.40x = 15,307,708,932.78 - Step 5: Solve for x
x = 15,307,708,932.78/139,782.40 - Step 6: Final answer
x = 109,510.99
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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.