Finding the Fourth Proportional to 157,138.24, 216,878.88 and 100,547.68
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Solution
The fourth proportional to 157,138.24, 216,878.88 and 100,547.68 is: 138,773.78
Step by Step Solution
- Step 1: Write the proportion equation
157,138.24 : 216,878.88 = 100,547.68 : x - Step 2: Convert to fraction form
157,138.24/216,878.88 = 100,547.68/x - Step 3: Cross multiply
157,138.24x = 216,878.88 × 100,547.68 - Step 4: Simplify right side
157,138.24x = 21,806,668,225.00 - Step 5: Solve for x
x = 21,806,668,225.00/157,138.24 - Step 6: Final answer
x = 138,773.78
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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.