Finding the Fourth Proportional to 138,738,880.35, 191,471,412.20 and 76,878,623.07
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Solution
The fourth proportional to 138,738,880.35, 191,471,412.20 and 76,878,623.07 is: 106,099,014.85
Step by Step Solution
- Step 1: Write the proportion equation
138,738,880.35 : 191,471,412.20 = 76,878,623.07 : x - Step 2: Convert to fraction form
138,738,880.35/191,471,412.20 = 76,878,623.07/x - Step 3: Cross multiply
138,738,880.35x = 191,471,412.20 × 76,878,623.07 - Step 4: Simplify right side
138,738,880.35x = 14,720,058,526,820,004 - Step 5: Solve for x
x = 14,720,058,526,820,004/138,738,880.35 - Step 6: Final answer
x = 106,099,014.85
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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.