Finding the Fourth Proportional to 128,386.92, 192,579.84 and 34,892.40
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Solution
The fourth proportional to 128,386.92, 192,579.84 and 34,892.40 is: 52,338.45
Step by Step Solution
- Step 1: Write the proportion equation
128,386.92 : 192,579.84 = 34,892.40 : x - Step 2: Convert to fraction form
128,386.92/192,579.84 = 34,892.40/x - Step 3: Cross multiply
128,386.92x = 192,579.84 × 34,892.40 - Step 4: Simplify right side
128,386.92x = 6,719,572,809.22 - Step 5: Solve for x
x = 6,719,572,809.22/128,386.92 - Step 6: Final answer
x = 52,338.45
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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.