Finding the Fourth Proportional to 138,627.70, 207,941.55 and 76,419.70
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Solution
The fourth proportional to 138,627.70, 207,941.55 and 76,419.70 is: 114,629.55
Step by Step Solution
- Step 1: Write the proportion equation
138,627.70 : 207,941.55 = 76,419.70 : x - Step 2: Convert to fraction form
138,627.70/207,941.55 = 76,419.70/x - Step 3: Cross multiply
138,627.70x = 207,941.55 × 76,419.70 - Step 4: Simplify right side
138,627.70x = 15,890,830,868.54 - Step 5: Solve for x
x = 15,890,830,868.54/138,627.70 - Step 6: Final answer
x = 114,629.55
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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.