Finding the Fourth Proportional to 87,970.15, 121,399.25 and 84,791.71
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Solution
The fourth proportional to 87,970.15, 121,399.25 and 84,791.71 is: 117,012.98
Step by Step Solution
- Step 1: Write the proportion equation
87,970.15 : 121,399.25 = 84,791.71 : x - Step 2: Convert to fraction form
87,970.15/121,399.25 = 84,791.71/x - Step 3: Cross multiply
87,970.15x = 121,399.25 × 84,791.71 - Step 4: Simplify right side
87,970.15x = 10,293,648,969.26 - Step 5: Solve for x
x = 10,293,648,969.26/87,970.15 - Step 6: Final answer
x = 117,012.98
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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.