Finding the Fourth Proportional to 128,917.66, 193,373.44 and 75,945.59
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Solution
The fourth proportional to 128,917.66, 193,373.44 and 75,945.59 is: 113,916.59
Step by Step Solution
- Step 1: Write the proportion equation
128,917.66 : 193,373.44 = 75,945.59 : x - Step 2: Convert to fraction form
128,917.66/193,373.44 = 75,945.59/x - Step 3: Cross multiply
128,917.66x = 193,373.44 × 75,945.59 - Step 4: Simplify right side
128,917.66x = 14,685,859,991.13 - Step 5: Solve for x
x = 14,685,859,991.13/128,917.66 - Step 6: Final answer
x = 113,916.59
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.