Finding the Fourth Proportional to 128,565.68, 177,418.69 and 71,979.08
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Solution
The fourth proportional to 128,565.68, 177,418.69 and 71,979.08 is: 99,330.04
Step by Step Solution
- Step 1: Write the proportion equation
128,565.68 : 177,418.69 = 71,979.08 : x - Step 2: Convert to fraction form
128,565.68/177,418.69 = 71,979.08/x - Step 3: Cross multiply
128,565.68x = 177,418.69 × 71,979.08 - Step 4: Simplify right side
128,565.68x = 12,770,433,013.96 - Step 5: Solve for x
x = 12,770,433,013.96/128,565.68 - Step 6: Final answer
x = 99,330.04
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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.