Finding the Fourth Proportional to 157,121.87, 216,832.70 and 85,506.42
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Solution
The fourth proportional to 157,121.87, 216,832.70 and 85,506.42 is: 118,001.32
Step by Step Solution
- Step 1: Write the proportion equation
157,121.87 : 216,832.70 = 85,506.42 : x - Step 2: Convert to fraction form
157,121.87/216,832.70 = 85,506.42/x - Step 3: Cross multiply
157,121.87x = 216,832.70 × 85,506.42 - Step 4: Simplify right side
157,121.87x = 18,540,587,488.40 - Step 5: Solve for x
x = 18,540,587,488.40/157,121.87 - Step 6: Final answer
x = 118,001.32
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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.