Finding the Fourth Proportional to 112.71, 155.58 and 73.89
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Solution
The fourth proportional to 112.71, 155.58 and 73.89 is: 101.99
Step by Step Solution
- Step 1: Write the proportion equation
112.71 : 155.58 = 73.89 : x - Step 2: Convert to fraction form
112.71/155.58 = 73.89/x - Step 3: Cross multiply
112.71x = 155.58 × 73.89 - Step 4: Simplify right side
112.71x = 11,495.81 - Step 5: Solve for x
x = 11,495.81/112.71 - Step 6: Final answer
x = 101.99
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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.