Finding the Fourth Proportional to 77,031.80, 115,547.70 and 71,847.80
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Solution
The fourth proportional to 77,031.80, 115,547.70 and 71,847.80 is: 107,771.70
Step by Step Solution
- Step 1: Write the proportion equation
77,031.80 : 115,547.70 = 71,847.80 : x - Step 2: Convert to fraction form
77,031.80/115,547.70 = 71,847.80/x - Step 3: Cross multiply
77,031.80x = 115,547.70 × 71,847.80 - Step 4: Simplify right side
77,031.80x = 8,301,848,040.06 - Step 5: Solve for x
x = 8,301,848,040.06/77,031.80 - Step 6: Final answer
x = 107,771.70
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1.5x scale
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.