Finding the Fourth Proportional to 90.56, 124.99 and 61.47
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Solution
The fourth proportional to 90.56, 124.99 and 61.47 is: 84.84
Step by Step Solution
- Step 1: Write the proportion equation
90.56 : 124.99 = 61.47 : x - Step 2: Convert to fraction form
90.56/124.99 = 61.47/x - Step 3: Cross multiply
90.56x = 124.99 × 61.47 - Step 4: Simplify right side
90.56x = 7,682.98 - Step 5: Solve for x
x = 7,682.98/90.56 - Step 6: Final answer
x = 84.84
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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.