Finding the Fourth Proportional to 81,446.37, 121,612.47 and 72,958.08
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Solution
The fourth proportional to 81,446.37, 121,612.47 and 72,958.08 is: 108,938.09
Step by Step Solution
- Step 1: Write the proportion equation
81,446.37 : 121,612.47 = 72,958.08 : x - Step 2: Convert to fraction form
81,446.37/121,612.47 = 72,958.08/x - Step 3: Cross multiply
81,446.37x = 121,612.47 × 72,958.08 - Step 4: Simplify right side
81,446.37x = 8,872,612,315.26 - Step 5: Solve for x
x = 8,872,612,315.26/81,446.37 - Step 6: Final answer
x = 108,938.09
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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.