Finding the Fourth Proportional to 138,175.67, 190,672.08 and 77,734.62
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Solution
The fourth proportional to 138,175.67, 190,672.08 and 77,734.62 is: 107,267.95
Step by Step Solution
- Step 1: Write the proportion equation
138,175.67 : 190,672.08 = 77,734.62 : x - Step 2: Convert to fraction form
138,175.67/190,672.08 = 77,734.62/x - Step 3: Cross multiply
138,175.67x = 190,672.08 × 77,734.62 - Step 4: Simplify right side
138,175.67x = 14,821,821,391.90 - Step 5: Solve for x
x = 14,821,821,391.90/138,175.67 - Step 6: Final answer
x = 107,267.95
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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.