Finding the Fourth Proportional to 153,998.70, 230,998.05 and 138,252.30
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Solution
The fourth proportional to 153,998.70, 230,998.05 and 138,252.30 is: 207,378.45
Step by Step Solution
- Step 1: Write the proportion equation
153,998.70 : 230,998.05 = 138,252.30 : x - Step 2: Convert to fraction form
153,998.70/230,998.05 = 138,252.30/x - Step 3: Cross multiply
153,998.70x = 230,998.05 × 138,252.30 - Step 4: Simplify right side
153,998.70x = 31,936,011,708.02 - Step 5: Solve for x
x = 31,936,011,708.02/153,998.70 - Step 6: Final answer
x = 207,378.45
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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.