Finding the Fourth Proportional to 74,868.68, 103,328.79 and 72,407.09
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Solution
The fourth proportional to 74,868.68, 103,328.79 and 72,407.09 is: 99,931.47
Step by Step Solution
- Step 1: Write the proportion equation
74,868.68 : 103,328.79 = 72,407.09 : x - Step 2: Convert to fraction form
74,868.68/103,328.79 = 72,407.09/x - Step 3: Cross multiply
74,868.68x = 103,328.79 × 72,407.09 - Step 4: Simplify right side
74,868.68x = 7,481,736,997.12 - Step 5: Solve for x
x = 7,481,736,997.12/74,868.68 - Step 6: Final answer
x = 99,931.47
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1.5x scale
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.