Finding the Fourth Proportional to 163,572.20, 245,358.30 and 128,142.80
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Solution
The fourth proportional to 163,572.20, 245,358.30 and 128,142.80 is: 192,214.20
Step by Step Solution
- Step 1: Write the proportion equation
163,572.20 : 245,358.30 = 128,142.80 : x - Step 2: Convert to fraction form
163,572.20/245,358.30 = 128,142.80/x - Step 3: Cross multiply
163,572.20x = 245,358.30 × 128,142.80 - Step 4: Simplify right side
163,572.20x = 31,440,899,565.24 - Step 5: Solve for x
x = 31,440,899,565.24/163,572.20 - Step 6: Final answer
x = 192,214.20
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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.