Finding the Fourth Proportional to 138,368.84, 190,879.26 and 80,970.44
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Solution
The fourth proportional to 138,368.84, 190,879.26 and 80,970.44 is: 111,698.40
Step by Step Solution
- Step 1: Write the proportion equation
138,368.84 : 190,879.26 = 80,970.44 : x - Step 2: Convert to fraction form
138,368.84/190,879.26 = 80,970.44/x - Step 3: Cross multiply
138,368.84x = 190,879.26 × 80,970.44 - Step 4: Simplify right side
138,368.84x = 15,455,577,669.07 - Step 5: Solve for x
x = 15,455,577,669.07/138,368.84 - Step 6: Final answer
x = 111,698.40
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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.