Finding the Fourth Proportional to 81,646.99, 122,478.23 and 31,730.94
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Solution
The fourth proportional to 81,646.99, 122,478.23 and 31,730.94 is: 47,599.42
Step by Step Solution
- Step 1: Write the proportion equation
81,646.99 : 122,478.23 = 31,730.94 : x - Step 2: Convert to fraction form
81,646.99/122,478.23 = 31,730.94/x - Step 3: Cross multiply
81,646.99x = 122,478.23 × 31,730.94 - Step 4: Simplify right side
81,646.99x = 3,886,349,367.44 - Step 5: Solve for x
x = 3,886,349,367.44/81,646.99 - Step 6: Final answer
x = 47,599.42
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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.