Finding the Fourth Proportional to 128,445,756.75, 177,255,236.79 and 69,708,406.68
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Solution
The fourth proportional to 128,445,756.75, 177,255,236.79 and 69,708,406.68 is: 96,197,651.41
Step by Step Solution
- Step 1: Write the proportion equation
128,445,756.75 : 177,255,236.79 = 69,708,406.68 : x - Step 2: Convert to fraction form
128,445,756.75/177,255,236.79 = 69,708,406.68/x - Step 3: Cross multiply
128,445,756.75x = 177,255,236.79 × 69,708,406.68 - Step 4: Simplify right side
128,445,756.75x = 12,356,180,132,317,018 - Step 5: Solve for x
x = 12,356,180,132,317,018/128,445,756.75 - Step 6: Final answer
x = 96,197,651.41
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.