Finding the Fourth Proportional to 128,151.93, 176,864.70 and 106,603.62
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Solution
The fourth proportional to 128,151.93, 176,864.70 and 106,603.62 is: 147,125.50
Step by Step Solution
- Step 1: Write the proportion equation
128,151.93 : 176,864.70 = 106,603.62 : x - Step 2: Convert to fraction form
128,151.93/176,864.70 = 106,603.62/x - Step 3: Cross multiply
128,151.93x = 176,864.70 × 106,603.62 - Step 4: Simplify right side
128,151.93x = 18,854,417,270.21 - Step 5: Solve for x
x = 18,854,417,270.21/128,151.93 - Step 6: Final answer
x = 147,125.50
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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.