Finding the Fourth Proportional to 135,081.72, 202,558.95 and 78,938.07
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Solution
The fourth proportional to 135,081.72, 202,558.95 and 78,938.07 is: 118,369.92
Step by Step Solution
- Step 1: Write the proportion equation
135,081.72 : 202,558.95 = 78,938.07 : x - Step 2: Convert to fraction form
135,081.72/202,558.95 = 78,938.07/x - Step 3: Cross multiply
135,081.72x = 202,558.95 × 78,938.07 - Step 4: Simplify right side
135,081.72x = 15,989,612,574.23 - Step 5: Solve for x
x = 15,989,612,574.23/135,081.72 - Step 6: Final answer
x = 118,369.92
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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.