Finding the Fourth Proportional to 128,455,121.90, 177,268,243.64 and 69,717,787.83
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Solution
The fourth proportional to 128,455,121.90, 177,268,243.64 and 69,717,787.83 is: 96,210,642.41
Step by Step Solution
- Step 1: Write the proportion equation
128,455,121.90 : 177,268,243.64 = 69,717,787.83 : x - Step 2: Convert to fraction form
128,455,121.90/177,268,243.64 = 69,717,787.83/x - Step 3: Cross multiply
128,455,121.90x = 177,268,243.64 × 69,717,787.83 - Step 4: Simplify right side
128,455,121.90x = 12,358,749,798,741,676 - Step 5: Solve for x
x = 12,358,749,798,741,676/128,455,121.90 - Step 6: Final answer
x = 96,210,642.41
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1.5x scale
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.