Finding the Fourth Proportional to 157,389.21, 217,190.79 and 85,767.71
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Solution
The fourth proportional to 157,389.21, 217,190.79 and 85,767.71 is: 118,355.99
Step by Step Solution
- Step 1: Write the proportion equation
157,389.21 : 217,190.79 = 85,767.71 : x - Step 2: Convert to fraction form
157,389.21/217,190.79 = 85,767.71/x - Step 3: Cross multiply
157,389.21x = 217,190.79 × 85,767.71 - Step 4: Simplify right side
157,389.21x = 18,627,955,605.44 - Step 5: Solve for x
x = 18,627,955,605.44/157,389.21 - Step 6: Final answer
x = 118,355.99
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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.