Finding the Fourth Proportional to 100,491.79, 138,680.30 and 55,173.95
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Solution
The fourth proportional to 100,491.79, 138,680.30 and 55,173.95 is: 76,140.95
Step by Step Solution
- Step 1: Write the proportion equation
100,491.79 : 138,680.30 = 55,173.95 : x - Step 2: Convert to fraction form
100,491.79/138,680.30 = 55,173.95/x - Step 3: Cross multiply
100,491.79x = 138,680.30 × 55,173.95 - Step 4: Simplify right side
100,491.79x = 7,651,539,938.19 - Step 5: Solve for x
x = 7,651,539,938.19/100,491.79 - Step 6: Final answer
x = 76,140.95
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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.