Finding the Fourth Proportional to 153.99, 212.36 and 104.21
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Solution
The fourth proportional to 153.99, 212.36 and 104.21 is: 143.71
Step by Step Solution
- Step 1: Write the proportion equation
153.99 : 212.36 = 104.21 : x - Step 2: Convert to fraction form
153.99/212.36 = 104.21/x - Step 3: Cross multiply
153.99x = 212.36 × 104.21 - Step 4: Simplify right side
153.99x = 22,129.23 - Step 5: Solve for x
x = 22,129.23/153.99 - Step 6: Final answer
x = 143.71
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.