Finding the Fourth Proportional to 99,136.23, 136,816.20 and 56,702.94
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Solution
The fourth proportional to 99,136.23, 136,816.20 and 56,702.94 is: 78,254.75
Step by Step Solution
- Step 1: Write the proportion equation
99,136.23 : 136,816.20 = 56,702.94 : x - Step 2: Convert to fraction form
99,136.23/136,816.20 = 56,702.94/x - Step 3: Cross multiply
99,136.23x = 136,816.20 × 56,702.94 - Step 4: Simplify right side
99,136.23x = 7,757,880,779.63 - Step 5: Solve for x
x = 7,757,880,779.63/99,136.23 - Step 6: Final answer
x = 78,254.75
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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.