Finding the Fourth Proportional to 128,385,305.26, 177,156,774.47 and 71,873,145.74
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Solution
The fourth proportional to 128,385,305.26, 177,156,774.47 and 71,873,145.74 is: 99,176,573.56
Step by Step Solution
- Step 1: Write the proportion equation
128,385,305.26 : 177,156,774.47 = 71,873,145.74 : x - Step 2: Convert to fraction form
128,385,305.26/177,156,774.47 = 71,873,145.74/x - Step 3: Cross multiply
128,385,305.26x = 177,156,774.47 × 71,873,145.74 - Step 4: Simplify right side
128,385,305.26x = 12,732,814,670,933,198 - Step 5: Solve for x
x = 12,732,814,670,933,198/128,385,305.26 - Step 6: Final answer
x = 99,176,573.56
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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.