Finding the Fourth Proportional to 128,465.60, 192,698.40 and 115,343.60
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Solution
The fourth proportional to 128,465.60, 192,698.40 and 115,343.60 is: 173,015.40
Step by Step Solution
- Step 1: Write the proportion equation
128,465.60 : 192,698.40 = 115,343.60 : x - Step 2: Convert to fraction form
128,465.60/192,698.40 = 115,343.60/x - Step 3: Cross multiply
128,465.60x = 192,698.40 × 115,343.60 - Step 4: Simplify right side
128,465.60x = 22,226,527,170.24 - Step 5: Solve for x
x = 22,226,527,170.24/128,465.60 - Step 6: Final answer
x = 173,015.40
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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.