Finding the Fourth Proportional to 157,987,783.12, 217,935,372.36 and 91,900,841.68
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Solution
The fourth proportional to 157,987,783.12, 217,935,372.36 and 91,900,841.68 is: 126,772,107.03
Step by Step Solution
- Step 1: Write the proportion equation
157,987,783.12 : 217,935,372.36 = 91,900,841.68 : x - Step 2: Convert to fraction form
157,987,783.12/217,935,372.36 = 91,900,841.68/x - Step 3: Cross multiply
157,987,783.12x = 217,935,372.36 × 91,900,841.68 - Step 4: Simplify right side
157,987,783.12x = 20,028,444,151,728,212 - Step 5: Solve for x
x = 20,028,444,151,728,212/157,987,783.12 - Step 6: Final answer
x = 126,772,107.03
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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.