Finding the Fourth Proportional to 278,521.20, 417,781.80 and 78,838.99
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Solution
The fourth proportional to 278,521.20, 417,781.80 and 78,838.99 is: 118,258.48
Step by Step Solution
- Step 1: Write the proportion equation
278,521.20 : 417,781.80 = 78,838.99 : x - Step 2: Convert to fraction form
278,521.20/417,781.80 = 78,838.99/x - Step 3: Cross multiply
278,521.20x = 417,781.80 × 78,838.99 - Step 4: Simplify right side
278,521.20x = 32,937,494,107.93 - Step 5: Solve for x
x = 32,937,494,107.93/278,521.20 - Step 6: Final answer
x = 118,258.48
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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.