Finding the Fourth Proportional to 138,076.80, 190,532.16 and 77,637.84
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Solution
The fourth proportional to 138,076.80, 190,532.16 and 77,637.84 is: 107,132.45
Step by Step Solution
- Step 1: Write the proportion equation
138,076.80 : 190,532.16 = 77,637.84 : x - Step 2: Convert to fraction form
138,076.80/190,532.16 = 77,637.84/x - Step 3: Cross multiply
138,076.80x = 190,532.16 × 77,637.84 - Step 4: Simplify right side
138,076.80x = 14,792,505,352.93 - Step 5: Solve for x
x = 14,792,505,352.93/138,076.80 - Step 6: Final answer
x = 107,132.45
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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.