Finding the Fourth Proportional to 78,221,398.32, 107,965,371.84 and 53,451,611.28
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Solution
The fourth proportional to 78,221,398.32, 107,965,371.84 and 53,451,611.28 is: 73,776,782.46
Step by Step Solution
- Step 1: Write the proportion equation
78,221,398.32 : 107,965,371.84 = 53,451,611.28 : x - Step 2: Convert to fraction form
78,221,398.32/107,965,371.84 = 53,451,611.28/x - Step 3: Cross multiply
78,221,398.32x = 107,965,371.84 × 53,451,611.28 - Step 4: Simplify right side
78,221,398.32x = 5,770,923,087,292,339 - Step 5: Solve for x
x = 5,770,923,087,292,339/78,221,398.32 - Step 6: Final answer
x = 73,776,782.46
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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.