Finding the Fourth Proportional to 158,431.79, 218,634.62 and 86,811.62
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Solution
The fourth proportional to 158,431.79, 218,634.62 and 86,811.62 is: 119,799.35
Step by Step Solution
- Step 1: Write the proportion equation
158,431.79 : 218,634.62 = 86,811.62 : x - Step 2: Convert to fraction form
158,431.79/218,634.62 = 86,811.62/x - Step 3: Cross multiply
158,431.79x = 218,634.62 × 86,811.62 - Step 4: Simplify right side
158,431.79x = 18,980,025,662.81 - Step 5: Solve for x
x = 18,980,025,662.81/158,431.79 - Step 6: Final answer
x = 119,799.35
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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.