Finding the Fourth Proportional to 138,214.23, 190,736.99 and 76,961.28
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Solution
The fourth proportional to 138,214.23, 190,736.99 and 76,961.28 is: 106,207.32
Step by Step Solution
- Step 1: Write the proportion equation
138,214.23 : 190,736.99 = 76,961.28 : x - Step 2: Convert to fraction form
138,214.23/190,736.99 = 76,961.28/x - Step 3: Cross multiply
138,214.23x = 190,736.99 × 76,961.28 - Step 4: Simplify right side
138,214.23x = 14,679,362,893.75 - Step 5: Solve for x
x = 14,679,362,893.75/138,214.23 - Step 6: Final answer
x = 106,207.32
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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.