Finding the Fourth Proportional to 139,729.68, 192,853.52 and 79,305.98
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Solution
The fourth proportional to 139,729.68, 192,853.52 and 79,305.98 is: 109,457.33
Step by Step Solution
- Step 1: Write the proportion equation
139,729.68 : 192,853.52 = 79,305.98 : x - Step 2: Convert to fraction form
139,729.68/192,853.52 = 79,305.98/x - Step 3: Cross multiply
139,729.68x = 192,853.52 × 79,305.98 - Step 4: Simplify right side
139,729.68x = 15,294,437,400.05 - Step 5: Solve for x
x = 15,294,437,400.05/139,729.68 - Step 6: Final answer
x = 109,457.33
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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.