Finding the Fourth Proportional to 121,728,931.68, 167,887,975.16 and 107,013,133.56
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Solution
The fourth proportional to 121,728,931.68, 167,887,975.16 and 107,013,133.56 is: 147,592,014.99
Step by Step Solution
- Step 1: Write the proportion equation
121,728,931.68 : 167,887,975.16 = 107,013,133.56 : x - Step 2: Convert to fraction form
121,728,931.68/167,887,975.16 = 107,013,133.56/x - Step 3: Cross multiply
121,728,931.68x = 167,887,975.16 × 107,013,133.56 - Step 4: Simplify right side
121,728,931.68x = 17,966,218,308,915,042 - Step 5: Solve for x
x = 17,966,218,308,915,042/121,728,931.68 - Step 6: Final answer
x = 147,592,014.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.