Finding the Fourth Proportional to 136,717.55, 188,642.05 and 78,563.05
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Solution
The fourth proportional to 136,717.55, 188,642.05 and 78,563.05 is: 108,400.82
Step by Step Solution
- Step 1: Write the proportion equation
136,717.55 : 188,642.05 = 78,563.05 : x - Step 2: Convert to fraction form
136,717.55/188,642.05 = 78,563.05/x - Step 3: Cross multiply
136,717.55x = 188,642.05 × 78,563.05 - Step 4: Simplify right side
136,717.55x = 14,820,294,138.24 - Step 5: Solve for x
x = 14,820,294,138.24/136,717.55 - Step 6: Final answer
x = 108,400.82
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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.