Finding the Fourth Proportional to 115,933.39, 159,991.62 and 64,945.99
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Solution
The fourth proportional to 115,933.39, 159,991.62 and 64,945.99 is: 89,627.45
Step by Step Solution
- Step 1: Write the proportion equation
115,933.39 : 159,991.62 = 64,945.99 : x - Step 2: Convert to fraction form
115,933.39/159,991.62 = 64,945.99/x - Step 3: Cross multiply
115,933.39x = 159,991.62 × 64,945.99 - Step 4: Simplify right side
115,933.39x = 10,390,814,152.60 - Step 5: Solve for x
x = 10,390,814,152.60/115,933.39 - Step 6: Final answer
x = 89,627.45
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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.