Finding the Fourth Proportional to 129,492,167.80, 194,238,251.70 and 128,736,340.60
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Solution
The fourth proportional to 129,492,167.80, 194,238,251.70 and 128,736,340.60 is: 193,104,510.90
Step by Step Solution
- Step 1: Write the proportion equation
129,492,167.80 : 194,238,251.70 = 128,736,340.60 : x - Step 2: Convert to fraction form
129,492,167.80/194,238,251.70 = 128,736,340.60/x - Step 3: Cross multiply
129,492,167.80x = 194,238,251.70 × 128,736,340.60 - Step 4: Simplify right side
129,492,167.80x = 25,005,521,728,399,728 - Step 5: Solve for x
x = 25,005,521,728,399,728/129,492,167.80 - Step 6: Final answer
x = 193,104,510.90
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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.