Finding the Fourth Proportional to 130,675.44, 180,405.99 and 99,990.84
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Solution
The fourth proportional to 130,675.44, 180,405.99 and 99,990.84 is: 138,043.89
Step by Step Solution
- Step 1: Write the proportion equation
130,675.44 : 180,405.99 = 99,990.84 : x - Step 2: Convert to fraction form
130,675.44/180,405.99 = 99,990.84/x - Step 3: Cross multiply
130,675.44x = 180,405.99 × 99,990.84 - Step 4: Simplify right side
130,675.44x = 18,038,946,481.13 - Step 5: Solve for x
x = 18,038,946,481.13/130,675.44 - Step 6: Final answer
x = 138,043.89
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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.