Finding the Fourth Proportional to 138,213.36, 190,732.64 and 77,784.08
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Solution
The fourth proportional to 138,213.36, 190,732.64 and 77,784.08 is: 107,341.02
Step by Step Solution
- Step 1: Write the proportion equation
138,213.36 : 190,732.64 = 77,784.08 : x - Step 2: Convert to fraction form
138,213.36/190,732.64 = 77,784.08/x - Step 3: Cross multiply
138,213.36x = 190,732.64 × 77,784.08 - Step 4: Simplify right side
138,213.36x = 14,835,962,928.37 - Step 5: Solve for x
x = 14,835,962,928.37/138,213.36 - Step 6: Final answer
x = 107,341.02
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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.