Finding the Fourth Proportional to 121,618.63, 167,916.68 and 79,250.95
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Solution
The fourth proportional to 121,618.63, 167,916.68 and 79,250.95 is: 109,420.38
Step by Step Solution
- Step 1: Write the proportion equation
121,618.63 : 167,916.68 = 79,250.95 : x - Step 2: Convert to fraction form
121,618.63/167,916.68 = 79,250.95/x - Step 3: Cross multiply
121,618.63x = 167,916.68 × 79,250.95 - Step 4: Simplify right side
121,618.63x = 13,307,556,410.85 - Step 5: Solve for x
x = 13,307,556,410.85/121,618.63 - Step 6: Final answer
x = 109,420.38
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1.5x scale
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.