Finding the Fourth Proportional to 81,657,017.60, 122,485,526.40 and 81,090,147.20
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Solution
The fourth proportional to 81,657,017.60, 122,485,526.40 and 81,090,147.20 is: 121,635,220.80
Step by Step Solution
- Step 1: Write the proportion equation
81,657,017.60 : 122,485,526.40 = 81,090,147.20 : x - Step 2: Convert to fraction form
81,657,017.60/122,485,526.40 = 81,090,147.20/x - Step 3: Cross multiply
81,657,017.60x = 122,485,526.40 × 81,090,147.20 - Step 4: Simplify right side
81,657,017.60x = 9,932,369,365,645,486 - Step 5: Solve for x
x = 9,932,369,365,645,486/81,657,017.60 - Step 6: Final answer
x = 121,635,220.80
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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.