Finding the Fourth Proportional to 128,955.79, 193,508.97 and 54,070.21
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Solution
The fourth proportional to 128,955.79, 193,508.97 and 54,070.21 is: 81,136.88
Step by Step Solution
- Step 1: Write the proportion equation
128,955.79 : 193,508.97 = 54,070.21 : x - Step 2: Convert to fraction form
128,955.79/193,508.97 = 54,070.21/x - Step 3: Cross multiply
128,955.79x = 193,508.97 × 54,070.21 - Step 4: Simplify right side
128,955.79x = 10,463,070,644.78 - Step 5: Solve for x
x = 10,463,070,644.78/128,955.79 - Step 6: Final answer
x = 81,136.88
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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.