Finding the Fourth Proportional to 138,299,975.20, 190,864,845.42 and 78,763,788.84
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Solution
The fourth proportional to 138,299,975.20, 190,864,845.42 and 78,763,788.84 is: 108,700,224.71
Step by Step Solution
- Step 1: Write the proportion equation
138,299,975.20 : 190,864,845.42 = 78,763,788.84 : x - Step 2: Convert to fraction form
138,299,975.20/190,864,845.42 = 78,763,788.84/x - Step 3: Cross multiply
138,299,975.20x = 190,864,845.42 × 78,763,788.84 - Step 4: Simplify right side
138,299,975.20x = 15,033,238,381,640,120 - Step 5: Solve for x
x = 15,033,238,381,640,120/138,299,975.20 - Step 6: Final answer
x = 108,700,224.71
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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.