Finding the Fourth Proportional to 153,974.16, 212,478.12 and 85,990.05
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Solution
The fourth proportional to 153,974.16, 212,478.12 and 85,990.05 is: 118,662.79
Step by Step Solution
- Step 1: Write the proportion equation
153,974.16 : 212,478.12 = 85,990.05 : x - Step 2: Convert to fraction form
153,974.16/212,478.12 = 85,990.05/x - Step 3: Cross multiply
153,974.16x = 212,478.12 × 85,990.05 - Step 4: Simplify right side
153,974.16x = 18,271,004,162.71 - Step 5: Solve for x
x = 18,271,004,162.71/153,974.16 - Step 6: Final answer
x = 118,662.79
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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.