Finding the Fourth Proportional to 128,463,105.52, 177,278,642.98 and 69,725,767.60
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Solution
The fourth proportional to 128,463,105.52, 177,278,642.98 and 69,725,767.60 is: 96,221,319.04
Step by Step Solution
- Step 1: Write the proportion equation
128,463,105.52 : 177,278,642.98 = 69,725,767.60 : x - Step 2: Convert to fraction form
128,463,105.52/177,278,642.98 = 69,725,767.60/x - Step 3: Cross multiply
128,463,105.52x = 177,278,642.98 × 69,725,767.60 - Step 4: Simplify right side
128,463,105.52x = 12,360,889,460,866,850 - Step 5: Solve for x
x = 12,360,889,460,866,850/128,463,105.52 - Step 6: Final answer
x = 96,221,319.04
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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.