Finding the Third Proportional to 66,921.75 and 139,389.75
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Solution
The third proportional to 66,921.75 and 139,389.75 is: 290,331.65
Step by Step Solution
- Step 1: Write the proportion equation
66,921.75 : 139,389.75 = 139,389.75 : x - Step 2: Convert to fraction form
66,921.75/139,389.75 = 139,389.75/x - Step 3: Cross multiply
66,921.75x = 139,389.75 × 139,389.75 - Step 4: Simplify right side
66,921.75x = 19,429,502,405.06 - Step 5: Solve for x
x = 19,429,502,405.06/66,921.75 - Step 6: Final answer
x = 290,331.65
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These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.