Finding the Fourth Proportional to 141,920.21, 195,845.69 and 78,257.99
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Solution
The fourth proportional to 141,920.21, 195,845.69 and 78,257.99 is: 107,993.70
Step by Step Solution
- Step 1: Write the proportion equation
141,920.21 : 195,845.69 = 78,257.99 : x - Step 2: Convert to fraction form
141,920.21/195,845.69 = 78,257.99/x - Step 3: Cross multiply
141,920.21x = 195,845.69 × 78,257.99 - Step 4: Simplify right side
141,920.21x = 15,326,488,679.04 - Step 5: Solve for x
x = 15,326,488,679.04/141,920.21 - Step 6: Final answer
x = 107,993.70
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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.