Finding the Fourth Proportional to 80,905.08, 121,412.28 and 28,315.02
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Solution
The fourth proportional to 80,905.08, 121,412.28 and 28,315.02 is: 42,491.66
Step by Step Solution
- Step 1: Write the proportion equation
80,905.08 : 121,412.28 = 28,315.02 : x - Step 2: Convert to fraction form
80,905.08/121,412.28 = 28,315.02/x - Step 3: Cross multiply
80,905.08x = 121,412.28 × 28,315.02 - Step 4: Simplify right side
80,905.08x = 3,437,791,136.45 - Step 5: Solve for x
x = 3,437,791,136.45/80,905.08 - Step 6: Final answer
x = 42,491.66
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.