Finding the Fourth Proportional to 93.19, 128.74 and 84.99
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Solution
The fourth proportional to 93.19, 128.74 and 84.99 is: 117.41
Step by Step Solution
- Step 1: Write the proportion equation
93.19 : 128.74 = 84.99 : x - Step 2: Convert to fraction form
93.19/128.74 = 84.99/x - Step 3: Cross multiply
93.19x = 128.74 × 84.99 - Step 4: Simplify right side
93.19x = 10,941.61 - Step 5: Solve for x
x = 10,941.61/93.19 - Step 6: Final answer
x = 117.41
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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.