Finding the Fourth Proportional to 70,631.12, 105,946.58 and 18,040.62
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Solution
The fourth proportional to 70,631.12, 105,946.58 and 18,040.62 is: 27,060.90
Step by Step Solution
- Step 1: Write the proportion equation
70,631.12 : 105,946.58 = 18,040.62 : x - Step 2: Convert to fraction form
70,631.12/105,946.58 = 18,040.62/x - Step 3: Cross multiply
70,631.12x = 105,946.58 × 18,040.62 - Step 4: Simplify right side
70,631.12x = 1,911,341,990.08 - Step 5: Solve for x
x = 1,911,341,990.08/70,631.12 - Step 6: Final answer
x = 27,060.90
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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.