Finding the Fourth Proportional to 100,040.79, 138,060.72 and 57,612.99
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Solution
The fourth proportional to 100,040.79, 138,060.72 and 57,612.99 is: 79,508.48
Step by Step Solution
- Step 1: Write the proportion equation
100,040.79 : 138,060.72 = 57,612.99 : x - Step 2: Convert to fraction form
100,040.79/138,060.72 = 57,612.99/x - Step 3: Cross multiply
100,040.79x = 138,060.72 × 57,612.99 - Step 4: Simplify right side
100,040.79x = 7,954,090,880.75 - Step 5: Solve for x
x = 7,954,090,880.75/100,040.79 - Step 6: Final answer
x = 79,508.48
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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.