Finding the Fourth Proportional to 209,815,866.68, 289,540,823.70 and 115,727,992.99
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Solution
The fourth proportional to 209,815,866.68, 289,540,823.70 and 115,727,992.99 is: 159,701,832.59
Step by Step Solution
- Step 1: Write the proportion equation
209,815,866.68 : 289,540,823.70 = 115,727,992.99 : x - Step 2: Convert to fraction form
209,815,866.68/289,540,823.70 = 115,727,992.99/x - Step 3: Cross multiply
209,815,866.68x = 289,540,823.70 × 115,727,992.99 - Step 4: Simplify right side
209,815,866.68x = 33,507,978,414,748,572 - Step 5: Solve for x
x = 33,507,978,414,748,572/209,815,866.68 - Step 6: Final answer
x = 159,701,832.59
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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.