Finding the Fourth Proportional to 156,503.70, 215,973.09 and 84,881.70
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Solution
The fourth proportional to 156,503.70, 215,973.09 and 84,881.70 is: 117,135.65
Step by Step Solution
- Step 1: Write the proportion equation
156,503.70 : 215,973.09 = 84,881.70 : x - Step 2: Convert to fraction form
156,503.70/215,973.09 = 84,881.70/x - Step 3: Cross multiply
156,503.70x = 215,973.09 × 84,881.70 - Step 4: Simplify right side
156,503.70x = 18,332,163,033.45 - Step 5: Solve for x
x = 18,332,163,033.45/156,503.70 - Step 6: Final answer
x = 117,135.65
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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.