Finding the Fourth Proportional to 156.99, 216.42 and 137.09
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Solution
The fourth proportional to 156.99, 216.42 and 137.09 is: 188.99
Step by Step Solution
- Step 1: Write the proportion equation
156.99 : 216.42 = 137.09 : x - Step 2: Convert to fraction form
156.99/216.42 = 137.09/x - Step 3: Cross multiply
156.99x = 216.42 × 137.09 - Step 4: Simplify right side
156.99x = 29,669.82 - Step 5: Solve for x
x = 29,669.82/156.99 - Step 6: Final answer
x = 188.99
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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.