Finding the Fourth Proportional to 212,909,905.80, 319,364,858.70 and 144,885,457.80
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Solution
The fourth proportional to 212,909,905.80, 319,364,858.70 and 144,885,457.80 is: 217,328,186.70
Step by Step Solution
- Step 1: Write the proportion equation
212,909,905.80 : 319,364,858.70 = 144,885,457.80 : x - Step 2: Convert to fraction form
212,909,905.80/319,364,858.70 = 144,885,457.80/x - Step 3: Cross multiply
212,909,905.80x = 319,364,858.70 × 144,885,457.80 - Step 4: Simplify right side
212,909,905.80x = 46,271,323,757,981,816 - Step 5: Solve for x
x = 46,271,323,757,981,816/212,909,905.80 - Step 6: Final answer
x = 217,328,186.70
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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.