Finding the Fourth Proportional to 158,242.21, 218,376.81 and 86,621.00
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Solution
The fourth proportional to 158,242.21, 218,376.81 and 86,621.00 is: 119,538.38
Step by Step Solution
- Step 1: Write the proportion equation
158,242.21 : 218,376.81 = 86,621.00 : x - Step 2: Convert to fraction form
158,242.21/218,376.81 = 86,621.00/x - Step 3: Cross multiply
158,242.21x = 218,376.81 × 86,621.00 - Step 4: Simplify right side
158,242.21x = 18,916,016,567.13 - Step 5: Solve for x
x = 18,916,016,567.13/158,242.21 - Step 6: Final answer
x = 119,538.38
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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.