Finding the Fourth Proportional to 100,972.08, 139,342.47 and 55,651.74
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Solution
The fourth proportional to 100,972.08, 139,342.47 and 55,651.74 is: 76,799.95
Step by Step Solution
- Step 1: Write the proportion equation
100,972.08 : 139,342.47 = 55,651.74 : x - Step 2: Convert to fraction form
100,972.08/139,342.47 = 55,651.74/x - Step 3: Cross multiply
100,972.08x = 139,342.47 × 55,651.74 - Step 4: Simplify right side
100,972.08x = 7,754,650,911.40 - Step 5: Solve for x
x = 7,754,650,911.40/100,972.08 - Step 6: Final answer
x = 76,799.95
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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.