Finding the Fourth Proportional to 100,685.36, 138,949.36 and 55,366.80
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Solution
The fourth proportional to 100,685.36, 138,949.36 and 55,366.80 is: 76,408.14
Step by Step Solution
- Step 1: Write the proportion equation
100,685.36 : 138,949.36 = 55,366.80 : x - Step 2: Convert to fraction form
100,685.36/138,949.36 = 55,366.80/x - Step 3: Cross multiply
100,685.36x = 138,949.36 × 55,366.80 - Step 4: Simplify right side
100,685.36x = 7,693,181,425.25 - Step 5: Solve for x
x = 7,693,181,425.25/100,685.36 - Step 6: Final answer
x = 76,408.14
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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.