Finding the Fourth Proportional to 136,122.64, 187,772.63 and 81,660.31
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Solution
The fourth proportional to 136,122.64, 187,772.63 and 81,660.31 is: 112,645.28
Step by Step Solution
- Step 1: Write the proportion equation
136,122.64 : 187,772.63 = 81,660.31 : x - Step 2: Convert to fraction form
136,122.64/187,772.63 = 81,660.31/x - Step 3: Cross multiply
136,122.64x = 187,772.63 × 81,660.31 - Step 4: Simplify right side
136,122.64x = 15,333,571,848.90 - Step 5: Solve for x
x = 15,333,571,848.90/136,122.64 - Step 6: Final answer
x = 112,645.28
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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.