Finding the Fourth Proportional to 121,321,981.80, 181,982,972.70 and 91,088,893.80
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Solution
The fourth proportional to 121,321,981.80, 181,982,972.70 and 91,088,893.80 is: 136,633,340.70
Step by Step Solution
- Step 1: Write the proportion equation
121,321,981.80 : 181,982,972.70 = 91,088,893.80 : x - Step 2: Convert to fraction form
121,321,981.80/181,982,972.70 = 91,088,893.80/x - Step 3: Cross multiply
121,321,981.80x = 181,982,972.70 × 91,088,893.80 - Step 4: Simplify right side
121,321,981.80x = 16,576,627,673,678,598 - Step 5: Solve for x
x = 16,576,627,673,678,598/121,321,981.80 - Step 6: Final answer
x = 136,633,340.70
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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.