Finding the Fourth Proportional to 155.59, 214.70 and 90.09
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Solution
The fourth proportional to 155.59, 214.70 and 90.09 is: 124.32
Step by Step Solution
- Step 1: Write the proportion equation
155.59 : 214.70 = 90.09 : x - Step 2: Convert to fraction form
155.59/214.70 = 90.09/x - Step 3: Cross multiply
155.59x = 214.70 × 90.09 - Step 4: Simplify right side
155.59x = 19,342.32 - Step 5: Solve for x
x = 19,342.32/155.59 - Step 6: Final answer
x = 124.32
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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.