Finding the Fourth Proportional to 138,276.81, 207,538.86 and 70,854.84
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Solution
The fourth proportional to 138,276.81, 207,538.86 and 70,854.84 is: 106,345.62
Step by Step Solution
- Step 1: Write the proportion equation
138,276.81 : 207,538.86 = 70,854.84 : x - Step 2: Convert to fraction form
138,276.81/207,538.86 = 70,854.84/x - Step 3: Cross multiply
138,276.81x = 207,538.86 × 70,854.84 - Step 4: Simplify right side
138,276.81x = 14,705,132,719.08 - Step 5: Solve for x
x = 14,705,132,719.08/138,276.81 - Step 6: Final answer
x = 106,345.62
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.