Finding the Fourth Proportional to 138,202.30, 190,716.87 and 77,772.88
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Solution
The fourth proportional to 138,202.30, 190,716.87 and 77,772.88 is: 107,325.28
Step by Step Solution
- Step 1: Write the proportion equation
138,202.30 : 190,716.87 = 77,772.88 : x - Step 2: Convert to fraction form
138,202.30/190,716.87 = 77,772.88/x - Step 3: Cross multiply
138,202.30x = 190,716.87 × 77,772.88 - Step 4: Simplify right side
138,202.30x = 14,832,600,244.49 - Step 5: Solve for x
x = 14,832,600,244.49/138,202.30 - Step 6: Final answer
x = 107,325.28
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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.