Finding the Fourth Proportional to 121,118,863.80, 181,461,782.70 and 73,709,077.80
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Solution
The fourth proportional to 121,118,863.80, 181,461,782.70 and 73,709,077.80 is: 110,431,853.79
Step by Step Solution
- Step 1: Write the proportion equation
121,118,863.80 : 181,461,782.70 = 73,709,077.80 : x - Step 2: Convert to fraction form
121,118,863.80/181,461,782.70 = 73,709,077.80/x - Step 3: Cross multiply
121,118,863.80x = 181,461,782.70 × 73,709,077.80 - Step 4: Simplify right side
121,118,863.80x = 13,375,380,658,760,992 - Step 5: Solve for x
x = 13,375,380,658,760,992/121,118,863.80 - Step 6: Final answer
x = 110,431,853.79
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.