Finding the Fourth Proportional to 93.99, 129.74 and 64.92
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Solution
The fourth proportional to 93.99, 129.74 and 64.92 is: 89.61
Step by Step Solution
- Step 1: Write the proportion equation
93.99 : 129.74 = 64.92 : x - Step 2: Convert to fraction form
93.99/129.74 = 64.92/x - Step 3: Cross multiply
93.99x = 129.74 × 64.92 - Step 4: Simplify right side
93.99x = 8,422.40 - Step 5: Solve for x
x = 8,422.40/93.99 - Step 6: Final answer
x = 89.61
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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.