Finding the Fourth Proportional to 256,871,661.12, 354,483,120.96 and 139,396,991.68
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Solution
The fourth proportional to 256,871,661.12, 354,483,120.96 and 139,396,991.68 is: 192,367,972.58
Step by Step Solution
- Step 1: Write the proportion equation
256,871,661.12 : 354,483,120.96 = 139,396,991.68 : x - Step 2: Convert to fraction form
256,871,661.12/354,483,120.96 = 139,396,991.68/x - Step 3: Cross multiply
256,871,661.12x = 354,483,120.96 × 139,396,991.68 - Step 4: Simplify right side
256,871,661.12x = 49,413,880,663,161,552 - Step 5: Solve for x
x = 49,413,880,663,161,552/256,871,661.12 - Step 6: Final answer
x = 192,367,972.58
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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.