Finding the Fourth Proportional to 157,399.21, 217,204.57 and 85,777.70
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Solution
The fourth proportional to 157,399.21, 217,204.57 and 85,777.70 is: 118,369.76
Step by Step Solution
- Step 1: Write the proportion equation
157,399.21 : 217,204.57 = 85,777.70 : x - Step 2: Convert to fraction form
157,399.21/217,204.57 = 85,777.70/x - Step 3: Cross multiply
157,399.21x = 217,204.57 × 85,777.70 - Step 4: Simplify right side
157,399.21x = 18,631,307,358.07 - Step 5: Solve for x
x = 18,631,307,358.07/157,399.21 - Step 6: Final answer
x = 118,369.76
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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.