Finding the Fourth Proportional to 138,437.20, 207,655.80 and 120,941.20
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Solution
The fourth proportional to 138,437.20, 207,655.80 and 120,941.20 is: 181,411.80
Step by Step Solution
- Step 1: Write the proportion equation
138,437.20 : 207,655.80 = 120,941.20 : x - Step 2: Convert to fraction form
138,437.20/207,655.80 = 120,941.20/x - Step 3: Cross multiply
138,437.20x = 207,655.80 × 120,941.20 - Step 4: Simplify right side
138,437.20x = 25,114,141,638.96 - Step 5: Solve for x
x = 25,114,141,638.96/138,437.20 - Step 6: Final answer
x = 181,411.80
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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.