Finding the Fourth Proportional to 128,958.74, 193,349.88 and 65,656.38
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Solution
The fourth proportional to 128,958.74, 193,349.88 and 65,656.38 is: 98,439.65
Step by Step Solution
- Step 1: Write the proportion equation
128,958.74 : 193,349.88 = 65,656.38 : x - Step 2: Convert to fraction form
128,958.74/193,349.88 = 65,656.38/x - Step 3: Cross multiply
128,958.74x = 193,349.88 × 65,656.38 - Step 4: Simplify right side
128,958.74x = 12,694,653,194.23 - Step 5: Solve for x
x = 12,694,653,194.23/128,958.74 - Step 6: Final answer
x = 98,439.65
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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.