Finding the Fourth Proportional to 255,780,871.68, 352,977,354 and 138,305,920.80
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Solution
The fourth proportional to 255,780,871.68, 352,977,354 and 138,305,920.80 is: 190,862,036.11
Step by Step Solution
- Step 1: Write the proportion equation
255,780,871.68 : 352,977,354 = 138,305,920.80 : x - Step 2: Convert to fraction form
255,780,871.68/352,977,354 = 138,305,920.80/x - Step 3: Cross multiply
255,780,871.68x = 352,977,354 × 138,305,920.80 - Step 4: Simplify right side
255,780,871.68x = 48,818,857,966,517,568 - Step 5: Solve for x
x = 48,818,857,966,517,568/255,780,871.68 - Step 6: Final answer
x = 190,862,036.11
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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.