Finding the Fourth Proportional to 128,901.36, 193,349.12 and 75,929.39
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Solution
The fourth proportional to 128,901.36, 193,349.12 and 75,929.39 is: 113,892.35
Step by Step Solution
- Step 1: Write the proportion equation
128,901.36 : 193,349.12 = 75,929.39 : x - Step 2: Convert to fraction form
128,901.36/193,349.12 = 75,929.39/x - Step 3: Cross multiply
128,901.36x = 193,349.12 × 75,929.39 - Step 4: Simplify right side
128,901.36x = 14,680,879,392.24 - Step 5: Solve for x
x = 14,680,879,392.24/128,901.36 - Step 6: Final answer
x = 113,892.35
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1.5x scale
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.