Finding the Fourth Proportional to 100,679.36, 138,941.09 and 55,360.79
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Solution
The fourth proportional to 100,679.36, 138,941.09 and 55,360.79 is: 76,399.85
Step by Step Solution
- Step 1: Write the proportion equation
100,679.36 : 138,941.09 = 55,360.79 : x - Step 2: Convert to fraction form
100,679.36/138,941.09 = 55,360.79/x - Step 3: Cross multiply
100,679.36x = 138,941.09 × 55,360.79 - Step 4: Simplify right side
100,679.36x = 7,691,888,229.06 - Step 5: Solve for x
x = 7,691,888,229.06/100,679.36 - Step 6: Final answer
x = 76,399.85
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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.