Finding the Fourth Proportional to 143.60, 198.27 and 99.99
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Solution
The fourth proportional to 143.60, 198.27 and 99.99 is: 138.06
Step by Step Solution
- Step 1: Write the proportion equation
143.60 : 198.27 = 99.99 : x - Step 2: Convert to fraction form
143.60/198.27 = 99.99/x - Step 3: Cross multiply
143.60x = 198.27 × 99.99 - Step 4: Simplify right side
143.60x = 19,825.02 - Step 5: Solve for x
x = 19,825.02/143.60 - Step 6: Final answer
x = 138.06
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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.