Finding the Fourth Proportional to 93.84, 129.49 and 56.99
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Solution
The fourth proportional to 93.84, 129.49 and 56.99 is: 78.64
Step by Step Solution
- Step 1: Write the proportion equation
93.84 : 129.49 = 56.99 : x - Step 2: Convert to fraction form
93.84/129.49 = 56.99/x - Step 3: Cross multiply
93.84x = 129.49 × 56.99 - Step 4: Simplify right side
93.84x = 7,379.64 - Step 5: Solve for x
x = 7,379.64/93.84 - Step 6: Final answer
x = 78.64
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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.