Finding the Fourth Proportional to 83,430.82, 115,137.40 and 45,705.06
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Solution
The fourth proportional to 83,430.82, 115,137.40 and 45,705.06 is: 63,074.55
Step by Step Solution
- Step 1: Write the proportion equation
83,430.82 : 115,137.40 = 45,705.06 : x - Step 2: Convert to fraction form
83,430.82/115,137.40 = 45,705.06/x - Step 3: Cross multiply
83,430.82x = 115,137.40 × 45,705.06 - Step 4: Simplify right side
83,430.82x = 5,262,361,775.24 - Step 5: Solve for x
x = 5,262,361,775.24/83,430.82 - Step 6: Final answer
x = 63,074.55
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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.