Finding the Fourth Proportional to 130,420.82, 179,968.28 and 103,628.18
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Solution
The fourth proportional to 130,420.82, 179,968.28 and 103,628.18 is: 142,996.99
Step by Step Solution
- Step 1: Write the proportion equation
130,420.82 : 179,968.28 = 103,628.18 : x - Step 2: Convert to fraction form
130,420.82/179,968.28 = 103,628.18/x - Step 3: Cross multiply
130,420.82x = 179,968.28 × 103,628.18 - Step 4: Simplify right side
130,420.82x = 18,649,785,314.13 - Step 5: Solve for x
x = 18,649,785,314.13/130,420.82 - Step 6: Final answer
x = 142,996.99
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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.