Finding the Fourth Proportional to 81,218.28, 121,795.14 and 31,270.70
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Solution
The fourth proportional to 81,218.28, 121,795.14 and 31,270.70 is: 46,893.62
Step by Step Solution
- Step 1: Write the proportion equation
81,218.28 : 121,795.14 = 31,270.70 : x - Step 2: Convert to fraction form
81,218.28/121,795.14 = 31,270.70/x - Step 3: Cross multiply
81,218.28x = 121,795.14 × 31,270.70 - Step 4: Simplify right side
81,218.28x = 3,808,619,284.40 - Step 5: Solve for x
x = 3,808,619,284.40/81,218.28 - Step 6: Final answer
x = 46,893.62
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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.