Finding the Fourth Proportional to 7,921,314,143.70, 11,881,971,215.55 and 2,105,223,839.70
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Solution
The fourth proportional to 7,921,314,143.70, 11,881,971,215.55 and 2,105,223,839.70 is: 3,157,835,759.55
Step by Step Solution
- Step 1: Write the proportion equation
7,921,314,143.70 : 11,881,971,215.55 = 2,105,223,839.70 : x - Step 2: Convert to fraction form
7,921,314,143.70/11,881,971,215.55 = 2,105,223,839.70/x - Step 3: Cross multiply
7,921,314,143.70x = 11,881,971,215.55 × 2,105,223,839.70 - Step 4: Simplify right side
7,921,314,143.70x = 25,014,209,065,605,046,272 - Step 5: Solve for x
x = 25,014,209,065,605,046,272/7,921,314,143.70 - Step 6: Final answer
x = 3,157,835,759.55
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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.