Finding the Fourth Proportional to 85,643,830.12, 128,445,175.69 and 39,541,403.87
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Solution
The fourth proportional to 85,643,830.12, 128,445,175.69 and 39,541,403.87 is: 59,302,608.96
Step by Step Solution
- Step 1: Write the proportion equation
85,643,830.12 : 128,445,175.69 = 39,541,403.87 : x - Step 2: Convert to fraction form
85,643,830.12/128,445,175.69 = 39,541,403.87/x - Step 3: Cross multiply
85,643,830.12x = 128,445,175.69 × 39,541,403.87 - Step 4: Simplify right side
85,643,830.12x = 5,078,902,567,111,395 - Step 5: Solve for x
x = 5,078,902,567,111,395/85,643,830.12 - Step 6: Final answer
x = 59,302,608.96
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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.