Finding the Fourth Proportional to 128,312.40, 192,796.65 and 113,878.20
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Solution
The fourth proportional to 128,312.40, 192,796.65 and 113,878.20 is: 171,108.45
Step by Step Solution
- Step 1: Write the proportion equation
128,312.40 : 192,796.65 = 113,878.20 : x - Step 2: Convert to fraction form
128,312.40/192,796.65 = 113,878.20/x - Step 3: Cross multiply
128,312.40x = 192,796.65 × 113,878.20 - Step 4: Simplify right side
128,312.40x = 21,955,335,468.03 - Step 5: Solve for x
x = 21,955,335,468.03/128,312.40 - Step 6: Final answer
x = 171,108.45
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.