Finding the Fourth Proportional to 81,304.40, 121,958.74 and 22,141.28
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Solution
The fourth proportional to 81,304.40, 121,958.74 and 22,141.28 is: 33,212.50
Step by Step Solution
- Step 1: Write the proportion equation
81,304.40 : 121,958.74 = 22,141.28 : x - Step 2: Convert to fraction form
81,304.40/121,958.74 = 22,141.28/x - Step 3: Cross multiply
81,304.40x = 121,958.74 × 22,141.28 - Step 4: Simplify right side
81,304.40x = 2,700,322,610.79 - Step 5: Solve for x
x = 2,700,322,610.79/81,304.40 - Step 6: Final answer
x = 33,212.50
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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.