Finding the Fourth Proportional to 138,362.52, 207,543.74 and 79,156.65
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Solution
The fourth proportional to 138,362.52, 207,543.74 and 79,156.65 is: 118,734.95
Step by Step Solution
- Step 1: Write the proportion equation
138,362.52 : 207,543.74 = 79,156.65 : x - Step 2: Convert to fraction form
138,362.52/207,543.74 = 79,156.65/x - Step 3: Cross multiply
138,362.52x = 207,543.74 × 79,156.65 - Step 4: Simplify right side
138,362.52x = 16,428,466,791.09 - Step 5: Solve for x
x = 16,428,466,791.09/138,362.52 - Step 6: Final answer
x = 118,734.95
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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.