Finding the Fourth Proportional to 115,663.60, 173,203.80 and 85,920.40
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Solution
The fourth proportional to 115,663.60, 173,203.80 and 85,920.40 is: 128,663.99
Step by Step Solution
- Step 1: Write the proportion equation
115,663.60 : 173,203.80 = 85,920.40 : x - Step 2: Convert to fraction form
115,663.60/173,203.80 = 85,920.40/x - Step 3: Cross multiply
115,663.60x = 173,203.80 × 85,920.40 - Step 4: Simplify right side
115,663.60x = 14,881,739,777.52 - Step 5: Solve for x
x = 14,881,739,777.52/115,663.60 - Step 6: Final answer
x = 128,663.99
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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.