Finding the Fourth Proportional to 154,631.68, 212,917.20 and 135,401.44
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Solution
The fourth proportional to 154,631.68, 212,917.20 and 135,401.44 is: 186,438.48
Step by Step Solution
- Step 1: Write the proportion equation
154,631.68 : 212,917.20 = 135,401.44 : x - Step 2: Convert to fraction form
154,631.68/212,917.20 = 135,401.44/x - Step 3: Cross multiply
154,631.68x = 212,917.20 × 135,401.44 - Step 4: Simplify right side
154,631.68x = 28,829,295,480.77 - Step 5: Solve for x
x = 28,829,295,480.77/154,631.68 - Step 6: Final answer
x = 186,438.48
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1.5x scale
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.