Finding the Fourth Proportional to 81,666.05, 122,506.79 and 31,749.98
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Solution
The fourth proportional to 81,666.05, 122,506.79 and 31,749.98 is: 47,627.96
Step by Step Solution
- Step 1: Write the proportion equation
81,666.05 : 122,506.79 = 31,749.98 : x - Step 2: Convert to fraction form
81,666.05/122,506.79 = 31,749.98/x - Step 3: Cross multiply
81,666.05x = 122,506.79 × 31,749.98 - Step 4: Simplify right side
81,666.05x = 3,889,587,361.08 - Step 5: Solve for x
x = 3,889,587,361.08/81,666.05 - Step 6: Final answer
x = 47,627.96
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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.