Finding the Fourth Proportional to 158,538.62, 218,777.48 and 86,917.08
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Solution
The fourth proportional to 158,538.62, 218,777.48 and 86,917.08 is: 119,942.38
Step by Step Solution
- Step 1: Write the proportion equation
158,538.62 : 218,777.48 = 86,917.08 : x - Step 2: Convert to fraction form
158,538.62/218,777.48 = 86,917.08/x - Step 3: Cross multiply
158,538.62x = 218,777.48 × 86,917.08 - Step 4: Simplify right side
158,538.62x = 19,015,499,731.36 - Step 5: Solve for x
x = 19,015,499,731.36/158,538.62 - Step 6: Final answer
x = 119,942.38
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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.