Finding the Fourth Proportional to 139,934.74, 193,115.20 and 79,515.68
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Solution
The fourth proportional to 139,934.74, 193,115.20 and 79,515.68 is: 109,734.63
Step by Step Solution
- Step 1: Write the proportion equation
139,934.74 : 193,115.20 = 79,515.68 : x - Step 2: Convert to fraction form
139,934.74/193,115.20 = 79,515.68/x - Step 3: Cross multiply
139,934.74x = 193,115.20 × 79,515.68 - Step 4: Simplify right side
139,934.74x = 15,355,686,446.34 - Step 5: Solve for x
x = 15,355,686,446.34/139,934.74 - Step 6: Final answer
x = 109,734.63
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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.