Finding the Fourth Proportional to 121,728,926.80, 167,887,968.44 and 107,013,128.68
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Solution
The fourth proportional to 121,728,926.80, 167,887,968.44 and 107,013,128.68 is: 147,592,008.27
Step by Step Solution
- Step 1: Write the proportion equation
121,728,926.80 : 167,887,968.44 = 107,013,128.68 : x - Step 2: Convert to fraction form
121,728,926.80/167,887,968.44 = 107,013,128.68/x - Step 3: Cross multiply
121,728,926.80x = 167,887,968.44 × 107,013,128.68 - Step 4: Simplify right side
121,728,926.80x = 17,966,216,770,493,500 - Step 5: Solve for x
x = 17,966,216,770,493,500/121,728,926.80 - Step 6: Final answer
x = 147,592,008.27
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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.