Finding the Fourth Proportional to 90.36, 124.71 and 69.63
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Solution
The fourth proportional to 90.36, 124.71 and 69.63 is: 96.09
Step by Step Solution
- Step 1: Write the proportion equation
90.36 : 124.71 = 69.63 : x - Step 2: Convert to fraction form
90.36/124.71 = 69.63/x - Step 3: Cross multiply
90.36x = 124.71 × 69.63 - Step 4: Simplify right side
90.36x = 8,682.83 - Step 5: Solve for x
x = 8,682.83/90.36 - Step 6: Final answer
x = 96.09
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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.