Finding the Fourth Proportional to 78,415.74, 117,623.61 and 28,486.53
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Solution
The fourth proportional to 78,415.74, 117,623.61 and 28,486.53 is: 42,729.80
Step by Step Solution
- Step 1: Write the proportion equation
78,415.74 : 117,623.61 = 28,486.53 : x - Step 2: Convert to fraction form
78,415.74/117,623.61 = 28,486.53/x - Step 3: Cross multiply
78,415.74x = 117,623.61 × 28,486.53 - Step 4: Simplify right side
78,415.74x = 3,350,688,494.97 - Step 5: Solve for x
x = 3,350,688,494.97/78,415.74 - Step 6: Final answer
x = 42,729.80
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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.