Finding the Fourth Proportional to 107,911.74, 148,968.35 and 76,886.99
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Solution
The fourth proportional to 107,911.74, 148,968.35 and 76,886.99 is: 106,139.77
Step by Step Solution
- Step 1: Write the proportion equation
107,911.74 : 148,968.35 = 76,886.99 : x - Step 2: Convert to fraction form
107,911.74/148,968.35 = 76,886.99/x - Step 3: Cross multiply
107,911.74x = 148,968.35 × 76,886.99 - Step 4: Simplify right side
107,911.74x = 11,453,727,754.45 - Step 5: Solve for x
x = 11,453,727,754.45/107,911.74 - Step 6: Final answer
x = 106,139.77
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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.