Finding the Fourth Proportional to 139,703.36, 192,785.48 and 76,039.80
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Solution
The fourth proportional to 139,703.36, 192,785.48 and 76,039.80 is: 104,932.12
Step by Step Solution
- Step 1: Write the proportion equation
139,703.36 : 192,785.48 = 76,039.80 : x - Step 2: Convert to fraction form
139,703.36/192,785.48 = 76,039.80/x - Step 3: Cross multiply
139,703.36x = 192,785.48 × 76,039.80 - Step 4: Simplify right side
139,703.36x = 14,659,369,342.10 - Step 5: Solve for x
x = 14,659,369,342.10/139,703.36 - Step 6: Final answer
x = 104,932.12
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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.