Finding the Fourth Proportional to 128,459.52, 177,263.28 and 73,997.28
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Solution
The fourth proportional to 128,459.52, 177,263.28 and 73,997.28 is: 102,109.99
Step by Step Solution
- Step 1: Write the proportion equation
128,459.52 : 177,263.28 = 73,997.28 : x - Step 2: Convert to fraction form
128,459.52/177,263.28 = 73,997.28/x - Step 3: Cross multiply
128,459.52x = 177,263.28 × 73,997.28 - Step 4: Simplify right side
128,459.52x = 13,117,000,563.88 - Step 5: Solve for x
x = 13,117,000,563.88/128,459.52 - Step 6: Final answer
x = 102,109.99
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1.5x scale
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.