Finding the Fourth Proportional to 31,208,863.68, 43,076,887.02 and 18,158,643.18
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Solution
The fourth proportional to 31,208,863.68, 43,076,887.02 and 18,158,643.18 is: 25,063,963.52
Step by Step Solution
- Step 1: Write the proportion equation
31,208,863.68 : 43,076,887.02 = 18,158,643.18 : x - Step 2: Convert to fraction form
31,208,863.68/43,076,887.02 = 18,158,643.18/x - Step 3: Cross multiply
31,208,863.68x = 43,076,887.02 × 18,158,643.18 - Step 4: Simplify right side
31,208,863.68x = 782,217,820,701,353.62 - Step 5: Solve for x
x = 782,217,820,701,353.62/31,208,863.68 - Step 6: Final answer
x = 25,063,963.52
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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.