Finding the Fourth Proportional to 157,787.28, 217,745.01 and 86,167.08
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Solution
The fourth proportional to 157,787.28, 217,745.01 and 86,167.08 is: 118,909.79
Step by Step Solution
- Step 1: Write the proportion equation
157,787.28 : 217,745.01 = 86,167.08 : x - Step 2: Convert to fraction form
157,787.28/217,745.01 = 86,167.08/x - Step 3: Cross multiply
157,787.28x = 217,745.01 × 86,167.08 - Step 4: Simplify right side
157,787.28x = 18,762,451,696.27 - Step 5: Solve for x
x = 18,762,451,696.27/157,787.28 - Step 6: Final answer
x = 118,909.79
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1.5x scale
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.