Finding the Fourth Proportional to 155.60, 214.78 and 122.99
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Solution
The fourth proportional to 155.60, 214.78 and 122.99 is: 169.77
Step by Step Solution
- Step 1: Write the proportion equation
155.60 : 214.78 = 122.99 : x - Step 2: Convert to fraction form
155.60/214.78 = 122.99/x - Step 3: Cross multiply
155.60x = 214.78 × 122.99 - Step 4: Simplify right side
155.60x = 26,415.79 - Step 5: Solve for x
x = 26,415.79/155.60 - Step 6: Final answer
x = 169.77
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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.