Finding the Fourth Proportional to 157,986.09, 218,020.86 and 86,366.07
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Solution
The fourth proportional to 157,986.09, 218,020.86 and 86,366.07 is: 119,185.21
Step by Step Solution
- Step 1: Write the proportion equation
157,986.09 : 218,020.86 = 86,366.07 : x - Step 2: Convert to fraction form
157,986.09/218,020.86 = 86,366.07/x - Step 3: Cross multiply
157,986.09x = 218,020.86 × 86,366.07 - Step 4: Simplify right side
157,986.09x = 18,829,604,856.22 - Step 5: Solve for x
x = 18,829,604,856.22/157,986.09 - Step 6: Final answer
x = 119,185.21
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1.5x scale
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.