Finding the Fourth Proportional to 208,590,700.21, 287,869,715.61 and 137,903,497.63
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Solution
The fourth proportional to 208,590,700.21, 287,869,715.61 and 137,903,497.63 is: 190,316,445.57
Step by Step Solution
- Step 1: Write the proportion equation
208,590,700.21 : 287,869,715.61 = 137,903,497.63 : x - Step 2: Convert to fraction form
208,590,700.21/287,869,715.61 = 137,903,497.63/x - Step 3: Cross multiply
208,590,700.21x = 287,869,715.61 × 137,903,497.63 - Step 4: Simplify right side
208,590,700.21x = 39,698,240,643,135,592 - Step 5: Solve for x
x = 39,698,240,643,135,592/208,590,700.21 - Step 6: Final answer
x = 190,316,445.57
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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.