Finding the Fourth Proportional to 138,201.84, 190,710.48 and 77,774.88
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Solution
The fourth proportional to 138,201.84, 190,710.48 and 77,774.88 is: 107,324.80
Step by Step Solution
- Step 1: Write the proportion equation
138,201.84 : 190,710.48 = 77,774.88 : x - Step 2: Convert to fraction form
138,201.84/190,710.48 = 77,774.88/x - Step 3: Cross multiply
138,201.84x = 190,710.48 × 77,774.88 - Step 4: Simplify right side
138,201.84x = 14,832,484,696.74 - Step 5: Solve for x
x = 14,832,484,696.74/138,201.84 - Step 6: Final answer
x = 107,324.80
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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.