Finding the Fourth Proportional to 39,872,117, 55,023,543.60 and 21,537,402.68
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Solution
The fourth proportional to 39,872,117, 55,023,543.60 and 21,537,402.68 is: 29,721,627.66
Step by Step Solution
- Step 1: Write the proportion equation
39,872,117 : 55,023,543.60 = 21,537,402.68 : x - Step 2: Convert to fraction form
39,872,117/55,023,543.60 = 21,537,402.68/x - Step 3: Cross multiply
39,872,117x = 55,023,543.60 × 21,537,402.68 - Step 4: Simplify right side
39,872,117x = 1,185,064,215,393,736.75 - Step 5: Solve for x
x = 1,185,064,215,393,736.75/39,872,117 - Step 6: Final answer
x = 29,721,627.66
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.