Finding the Fourth Proportional to 81,165.29, 121,153.56 and 71,578.11
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Solution
The fourth proportional to 81,165.29, 121,153.56 and 71,578.11 is: 106,842.99
Step by Step Solution
- Step 1: Write the proportion equation
81,165.29 : 121,153.56 = 71,578.11 : x - Step 2: Convert to fraction form
81,165.29/121,153.56 = 71,578.11/x - Step 3: Cross multiply
81,165.29x = 121,153.56 × 71,578.11 - Step 4: Simplify right side
81,165.29x = 8,671,942,612.19 - Step 5: Solve for x
x = 8,671,942,612.19/81,165.29 - Step 6: Final answer
x = 106,842.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.