Finding the Fourth Proportional to 128,718.08, 193,047.92 and 45,612.08
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Solution
The fourth proportional to 128,718.08, 193,047.92 and 45,612.08 is: 68,407.77
Step by Step Solution
- Step 1: Write the proportion equation
128,718.08 : 193,047.92 = 45,612.08 : x - Step 2: Convert to fraction form
128,718.08/193,047.92 = 45,612.08/x - Step 3: Cross multiply
128,718.08x = 193,047.92 × 45,612.08 - Step 4: Simplify right side
128,718.08x = 8,805,317,170.87 - Step 5: Solve for x
x = 8,805,317,170.87/128,718.08 - Step 6: Final answer
x = 68,407.77
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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.