Finding the Fourth Proportional to 157,239.42, 216,990.25 and 85,619.95
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Solution
The fourth proportional to 157,239.42, 216,990.25 and 85,619.95 is: 118,155.45
Step by Step Solution
- Step 1: Write the proportion equation
157,239.42 : 216,990.25 = 85,619.95 : x - Step 2: Convert to fraction form
157,239.42/216,990.25 = 85,619.95/x - Step 3: Cross multiply
157,239.42x = 216,990.25 × 85,619.95 - Step 4: Simplify right side
157,239.42x = 18,578,694,355.49 - Step 5: Solve for x
x = 18,578,694,355.49/157,239.42 - Step 6: Final answer
x = 118,155.45
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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.