Finding the Fourth Proportional to 78,920.68, 118,391.82 and 36,779.08
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Solution
The fourth proportional to 78,920.68, 118,391.82 and 36,779.08 is: 55,173.65
Step by Step Solution
- Step 1: Write the proportion equation
78,920.68 : 118,391.82 = 36,779.08 : x - Step 2: Convert to fraction form
78,920.68/118,391.82 = 36,779.08/x - Step 3: Cross multiply
78,920.68x = 118,391.82 × 36,779.08 - Step 4: Simplify right side
78,920.68x = 4,354,342,219.13 - Step 5: Solve for x
x = 4,354,342,219.13/78,920.68 - Step 6: Final answer
x = 55,173.65
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.