Finding the Fourth Proportional to 120,177.36, 165,865.57 and 72,430.76
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Solution
The fourth proportional to 120,177.36, 165,865.57 and 72,430.76 is: 99,966.99
Step by Step Solution
- Step 1: Write the proportion equation
120,177.36 : 165,865.57 = 72,430.76 : x - Step 2: Convert to fraction form
120,177.36/165,865.57 = 72,430.76/x - Step 3: Cross multiply
120,177.36x = 165,865.57 × 72,430.76 - Step 4: Simplify right side
120,177.36x = 12,013,769,526.52 - Step 5: Solve for x
x = 12,013,769,526.52/120,177.36 - Step 6: Final answer
x = 99,966.99
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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.