Finding the Fourth Proportional to 81,147.24, 121,726.95 and 21,981.99
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Solution
The fourth proportional to 81,147.24, 121,726.95 and 21,981.99 is: 32,974.63
Step by Step Solution
- Step 1: Write the proportion equation
81,147.24 : 121,726.95 = 21,981.99 : x - Step 2: Convert to fraction form
81,147.24/121,726.95 = 21,981.99/x - Step 3: Cross multiply
81,147.24x = 121,726.95 × 21,981.99 - Step 4: Simplify right side
81,147.24x = 2,675,800,597.63 - Step 5: Solve for x
x = 2,675,800,597.63/81,147.24 - Step 6: Final answer
x = 32,974.63
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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.