Finding the Third Proportional to 128,854.50 and 189,418.50
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Solution
The third proportional to 128,854.50 and 189,418.50 is: 278,448.70
Step by Step Solution
- Step 1: Write the proportion equation
128,854.50 : 189,418.50 = 189,418.50 : x - Step 2: Convert to fraction form
128,854.50/189,418.50 = 189,418.50/x - Step 3: Cross multiply
128,854.50x = 189,418.50 × 189,418.50 - Step 4: Simplify right side
128,854.50x = 35,879,368,142.25 - Step 5: Solve for x
x = 35,879,368,142.25/128,854.50 - Step 6: Final answer
x = 278,448.70
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These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.