Finding the Fourth Proportional to 90.31, 135.99 and 79.03
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Solution
The fourth proportional to 90.31, 135.99 and 79.03 is: 119.00
Step by Step Solution
- Step 1: Write the proportion equation
90.31 : 135.99 = 79.03 : x - Step 2: Convert to fraction form
90.31/135.99 = 79.03/x - Step 3: Cross multiply
90.31x = 135.99 × 79.03 - Step 4: Simplify right side
90.31x = 10,747.29 - Step 5: Solve for x
x = 10,747.29/90.31 - Step 6: Final answer
x = 119.00
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.