Finding the Fourth Proportional to 138,299,973.20, 190,864,842.66 and 78,763,786.84
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Solution
The fourth proportional to 138,299,973.20, 190,864,842.66 and 78,763,786.84 is: 108,700,221.95
Step by Step Solution
- Step 1: Write the proportion equation
138,299,973.20 : 190,864,842.66 = 78,763,786.84 : x - Step 2: Convert to fraction form
138,299,973.20/190,864,842.66 = 78,763,786.84/x - Step 3: Cross multiply
138,299,973.20x = 190,864,842.66 × 78,763,786.84 - Step 4: Simplify right side
138,299,973.20x = 15,033,237,782,522,378 - Step 5: Solve for x
x = 15,033,237,782,522,378/138,299,973.20 - Step 6: Final answer
x = 108,700,221.95
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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.