Finding the Fourth Proportional to 80,791.36, 121,043.68 and 68,985.28
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Solution
The fourth proportional to 80,791.36, 121,043.68 and 68,985.28 is: 103,355.51
Step by Step Solution
- Step 1: Write the proportion equation
80,791.36 : 121,043.68 = 68,985.28 : x - Step 2: Convert to fraction form
80,791.36/121,043.68 = 68,985.28/x - Step 3: Cross multiply
80,791.36x = 121,043.68 × 68,985.28 - Step 4: Simplify right side
80,791.36x = 8,350,232,157.03 - Step 5: Solve for x
x = 8,350,232,157.03/80,791.36 - Step 6: Final answer
x = 103,355.51
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.