Finding the Fourth Proportional to 157,397.09, 217,241.52 and 103,686.80
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Solution
The fourth proportional to 157,397.09, 217,241.52 and 103,686.80 is: 143,109.88
Step by Step Solution
- Step 1: Write the proportion equation
157,397.09 : 217,241.52 = 103,686.80 : x - Step 2: Convert to fraction form
157,397.09/217,241.52 = 103,686.80/x - Step 3: Cross multiply
157,397.09x = 217,241.52 × 103,686.80 - Step 4: Simplify right side
157,397.09x = 22,525,078,035.94 - Step 5: Solve for x
x = 22,525,078,035.94/157,397.09 - Step 6: Final answer
x = 143,109.88
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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.