Finding the Fourth Proportional to 138,638.28, 207,957.36 and 54,438.06
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Solution
The fourth proportional to 138,638.28, 207,957.36 and 54,438.06 is: 81,657.07
Step by Step Solution
- Step 1: Write the proportion equation
138,638.28 : 207,957.36 = 54,438.06 : x - Step 2: Convert to fraction form
138,638.28/207,957.36 = 54,438.06/x - Step 3: Cross multiply
138,638.28x = 207,957.36 × 54,438.06 - Step 4: Simplify right side
138,638.28x = 11,320,795,241.12 - Step 5: Solve for x
x = 11,320,795,241.12/138,638.28 - Step 6: Final answer
x = 81,657.07
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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.