Finding the Fourth Proportional to 138,437.70, 207,656.55 and 120,941.70
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Solution
The fourth proportional to 138,437.70, 207,656.55 and 120,941.70 is: 181,412.55
Step by Step Solution
- Step 1: Write the proportion equation
138,437.70 : 207,656.55 = 120,941.70 : x - Step 2: Convert to fraction form
138,437.70/207,656.55 = 120,941.70/x - Step 3: Cross multiply
138,437.70x = 207,656.55 × 120,941.70 - Step 4: Simplify right side
138,437.70x = 25,114,336,173.14 - Step 5: Solve for x
x = 25,114,336,173.14/138,437.70 - Step 6: Final answer
x = 181,412.55
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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.