Finding the Fourth Proportional to 210,918.75, 316,379.25 and 86,259.75
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Solution
The fourth proportional to 210,918.75, 316,379.25 and 86,259.75 is: 129,390.09
Step by Step Solution
- Step 1: Write the proportion equation
210,918.75 : 316,379.25 = 86,259.75 : x - Step 2: Convert to fraction form
210,918.75/316,379.25 = 86,259.75/x - Step 3: Cross multiply
210,918.75x = 316,379.25 × 86,259.75 - Step 4: Simplify right side
210,918.75x = 27,290,795,010.19 - Step 5: Solve for x
x = 27,290,795,010.19/210,918.75 - Step 6: Final answer
x = 129,390.09
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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.