Finding the Fourth Proportional to 288,518.99, 432,724.12 and 78,129.23
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Solution
The fourth proportional to 288,518.99, 432,724.12 and 78,129.23 is: 117,179.12
Step by Step Solution
- Step 1: Write the proportion equation
288,518.99 : 432,724.12 = 78,129.23 : x - Step 2: Convert to fraction form
288,518.99/432,724.12 = 78,129.23/x - Step 3: Cross multiply
288,518.99x = 432,724.12 × 78,129.23 - Step 4: Simplify right side
288,518.99x = 33,808,399,939.08 - Step 5: Solve for x
x = 33,808,399,939.08/288,518.99 - Step 6: Final answer
x = 117,179.12
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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.