Finding the Fourth Proportional to 90,428,452.70, 135,642,679.05 and 86,271,403.10
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Solution
The fourth proportional to 90,428,452.70, 135,642,679.05 and 86,271,403.10 is: 129,407,104.65
Step by Step Solution
- Step 1: Write the proportion equation
90,428,452.70 : 135,642,679.05 = 86,271,403.10 : x - Step 2: Convert to fraction form
90,428,452.70/135,642,679.05 = 86,271,403.10/x - Step 3: Cross multiply
90,428,452.70x = 135,642,679.05 × 86,271,403.10 - Step 4: Simplify right side
90,428,452.70x = 11,702,084,241,886,476 - Step 5: Solve for x
x = 11,702,084,241,886,476/90,428,452.70 - Step 6: Final answer
x = 129,407,104.65
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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.