Finding the Fourth Proportional to 138,125.64, 207,538.70 and 128,838.12
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Solution
The fourth proportional to 138,125.64, 207,538.70 and 128,838.12 is: 193,583.87
Step by Step Solution
- Step 1: Write the proportion equation
138,125.64 : 207,538.70 = 128,838.12 : x - Step 2: Convert to fraction form
138,125.64/207,538.70 = 128,838.12/x - Step 3: Cross multiply
138,125.64x = 207,538.70 × 128,838.12 - Step 4: Simplify right side
138,125.64x = 26,738,895,935.24 - Step 5: Solve for x
x = 26,738,895,935.24/138,125.64 - Step 6: Final answer
x = 193,583.87
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1.5x scale
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.