Finding the Fourth Proportional to 75,136.12, 103,688.02 and 40,681.20
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Solution
The fourth proportional to 75,136.12, 103,688.02 and 40,681.20 is: 56,140.15
Step by Step Solution
- Step 1: Write the proportion equation
75,136.12 : 103,688.02 = 40,681.20 : x - Step 2: Convert to fraction form
75,136.12/103,688.02 = 40,681.20/x - Step 3: Cross multiply
75,136.12x = 103,688.02 × 40,681.20 - Step 4: Simplify right side
75,136.12x = 4,218,153,079.22 - Step 5: Solve for x
x = 4,218,153,079.22/75,136.12 - Step 6: Final answer
x = 56,140.15
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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.