Finding the Fourth Proportional to 85,312.08, 128,046.65 and 43,221.44
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Solution
The fourth proportional to 85,312.08, 128,046.65 and 43,221.44 is: 64,871.95
Step by Step Solution
- Step 1: Write the proportion equation
85,312.08 : 128,046.65 = 43,221.44 : x - Step 2: Convert to fraction form
85,312.08/128,046.65 = 43,221.44/x - Step 3: Cross multiply
85,312.08x = 128,046.65 × 43,221.44 - Step 4: Simplify right side
85,312.08x = 5,534,360,600.18 - Step 5: Solve for x
x = 5,534,360,600.18/85,312.08 - Step 6: Final answer
x = 64,871.95
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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.