Finding the Fourth Proportional to 81,321.19, 112,292.49 and 51,156.99
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Solution
The fourth proportional to 81,321.19, 112,292.49 and 51,156.99 is: 70,640.21
Step by Step Solution
- Step 1: Write the proportion equation
81,321.19 : 112,292.49 = 51,156.99 : x - Step 2: Convert to fraction form
81,321.19/112,292.49 = 51,156.99/x - Step 3: Cross multiply
81,321.19x = 112,292.49 × 51,156.99 - Step 4: Simplify right side
81,321.19x = 5,744,545,979.84 - Step 5: Solve for x
x = 5,744,545,979.84/81,321.19 - Step 6: Final answer
x = 70,640.21
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.