Finding the Fourth Proportional to 100,580.29, 138,803.79 and 55,261.09
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Solution
The fourth proportional to 100,580.29, 138,803.79 and 55,261.09 is: 76,261.95
Step by Step Solution
- Step 1: Write the proportion equation
100,580.29 : 138,803.79 = 55,261.09 : x - Step 2: Convert to fraction form
100,580.29/138,803.79 = 55,261.09/x - Step 3: Cross multiply
100,580.29x = 138,803.79 × 55,261.09 - Step 4: Simplify right side
100,580.29x = 7,670,448,731.53 - Step 5: Solve for x
x = 7,670,448,731.53/100,580.29 - Step 6: Final answer
x = 76,261.95
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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.