Finding the Fourth Proportional to 138,968.81, 207,954.93 and 120,313.01
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Solution
The fourth proportional to 138,968.81, 207,954.93 and 120,313.01 is: 180,038.12
Step by Step Solution
- Step 1: Write the proportion equation
138,968.81 : 207,954.93 = 120,313.01 : x - Step 2: Convert to fraction form
138,968.81/207,954.93 = 120,313.01/x - Step 3: Cross multiply
138,968.81x = 207,954.93 × 120,313.01 - Step 4: Simplify right side
138,968.81x = 25,019,683,572.64 - Step 5: Solve for x
x = 25,019,683,572.64/138,968.81 - Step 6: Final answer
x = 180,038.12
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.