Finding the Fourth Proportional to 96,809.70, 145,214.55 and 81,257.70
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Solution
The fourth proportional to 96,809.70, 145,214.55 and 81,257.70 is: 121,886.55
Step by Step Solution
- Step 1: Write the proportion equation
96,809.70 : 145,214.55 = 81,257.70 : x - Step 2: Convert to fraction form
96,809.70/145,214.55 = 81,257.70/x - Step 3: Cross multiply
96,809.70x = 145,214.55 × 81,257.70 - Step 4: Simplify right side
96,809.70x = 11,799,800,339.54 - Step 5: Solve for x
x = 11,799,800,339.54/96,809.70 - Step 6: Final answer
x = 121,886.55
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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.