Finding the Fourth Proportional to 138,049.68, 190,038.42 and 102,172.08
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Solution
The fourth proportional to 138,049.68, 190,038.42 and 102,172.08 is: 140,649.52
Step by Step Solution
- Step 1: Write the proportion equation
138,049.68 : 190,038.42 = 102,172.08 : x - Step 2: Convert to fraction form
138,049.68/190,038.42 = 102,172.08/x - Step 3: Cross multiply
138,049.68x = 190,038.42 × 102,172.08 - Step 4: Simplify right side
138,049.68x = 19,416,620,651.31 - Step 5: Solve for x
x = 19,416,620,651.31/138,049.68 - Step 6: Final answer
x = 140,649.52
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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.