Finding the Fourth Proportional to 85,955,419.80, 128,933,129.70 and 58,745,640.60
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Solution
The fourth proportional to 85,955,419.80, 128,933,129.70 and 58,745,640.60 is: 88,118,460.90
Step by Step Solution
- Step 1: Write the proportion equation
85,955,419.80 : 128,933,129.70 = 58,745,640.60 : x - Step 2: Convert to fraction form
85,955,419.80/128,933,129.70 = 58,745,640.60/x - Step 3: Cross multiply
85,955,419.80x = 128,933,129.70 × 58,745,640.60 - Step 4: Simplify right side
85,955,419.80x = 7,574,259,298,789,386 - Step 5: Solve for x
x = 7,574,259,298,789,386/85,955,419.80 - Step 6: Final answer
x = 88,118,460.90
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Double scale
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Similar ratio
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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.