Finding the Fourth Proportional to 84,855.60, 126,663.05 and 78,688.08
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Solution
The fourth proportional to 84,855.60, 126,663.05 and 78,688.08 is: 117,456.86
Step by Step Solution
- Step 1: Write the proportion equation
84,855.60 : 126,663.05 = 78,688.08 : x - Step 2: Convert to fraction form
84,855.60/126,663.05 = 78,688.08/x - Step 3: Cross multiply
84,855.60x = 126,663.05 × 78,688.08 - Step 4: Simplify right side
84,855.60x = 9,966,872,211.44 - Step 5: Solve for x
x = 9,966,872,211.44/84,855.60 - Step 6: Final answer
x = 117,456.86
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.