Finding the Fourth Proportional to 129,756.36, 179,070.84 and 72,408.36
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Solution
The fourth proportional to 129,756.36, 179,070.84 and 72,408.36 is: 99,927.48
Step by Step Solution
- Step 1: Write the proportion equation
129,756.36 : 179,070.84 = 72,408.36 : x - Step 2: Convert to fraction form
129,756.36/179,070.84 = 72,408.36/x - Step 3: Cross multiply
129,756.36x = 179,070.84 × 72,408.36 - Step 4: Simplify right side
129,756.36x = 12,966,225,848.22 - Step 5: Solve for x
x = 12,966,225,848.22/129,756.36 - Step 6: Final answer
x = 99,927.48
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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.