Finding the Fourth Proportional to 138,220.68, 190,744.82 and 78,604.68
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Solution
The fourth proportional to 138,220.68, 190,744.82 and 78,604.68 is: 108,474.62
Step by Step Solution
- Step 1: Write the proportion equation
138,220.68 : 190,744.82 = 78,604.68 : x - Step 2: Convert to fraction form
138,220.68/190,744.82 = 78,604.68/x - Step 3: Cross multiply
138,220.68x = 190,744.82 × 78,604.68 - Step 4: Simplify right side
138,220.68x = 14,993,435,537.76 - Step 5: Solve for x
x = 14,993,435,537.76/138,220.68 - Step 6: Final answer
x = 108,474.62
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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.